"Your father and I will be gone quite some time," Bella said.
"Yeah, Mom," Lucin said, rolling his eyes. "We got it."
"Have a lovely trip," Celeste said without taking her eyes off her book.
"Your concern for our absence is touching," Bella said, eyeing her children.
"Hey, it's your trip," Lucin said. "Don't blame us."
"'Sides, we're responsible adults," Celeste said without a trace of irony. "We'll struggle along somehow."
"Yes, speaking of which," Bella said, eyes narrowing slightly, "we're rather hoping to avoid an incident like last time."
"Oh come on! That was three years ago!" Lucin complained. "Are we never going to live that down?"
"Practically all of the kitchen was saved," Celeste added. "And the azaleas came back fine."
"No one was hurt," Lucin pouted. "Much."
"And the therapy afterward was actually quite help--"
"Nevertheless," Bella interrupted with much exasperation, "we don't want to take any chances. No pouting. Yes you're adults, but you still live with your parents, don't you?"
"Ouch," Lucin said.
"She's got us there," Celeste agreed. "Well roasted, Mother."
Bella sighed. "And there is the fact that neither of you can take anything seriously."
"Lies!"
"Untruths!"
"I took something seriously just last week!" Lucin said firmly.
"It was a wonder to behold," Celeste agreed, nodding fervently.
"Well done you, then," Bella said, moving right along. "Regardless, we are leaving the two of you with a robot nanny, so that--"
Twin boos interrupted Bella's thought.
"Oh what? Those are for babies!" Lucin protested.
"They have not been approved for babies yet," Bella said. "They--"
"Ugh, the ridicule we'll face," Celeste complained. "Like 'oh you guys got one of those new robots? Which one? A super cool laser unicorn transformer probably right?' But no. A babysitter. We shall simply have no friends after this gets out."
"You're very free to find homes of your own, you know," Bella said sternly, hands on hips.
Lucin and Celeste looked at each other.
"No, this is fine."
"Perfectly acceptable."
"Have a lovely trip."
"Do send a postcard, if those are still a thing."
Bella rolled her eyes and walked out.
****
"So this is her, huh?" Lucin said, peering intently.
"Seems that way," Celeste said, standing back a bit with her arms folded.
"She's, uh, I mean she's kinda weird."
"Yeah, some of the new ones they're trying to, like, make them lifelike without hitting that uncanny valley shit."
Lucin nodded. "Which is fine, but like, I don't know about this cyborg-y aesthetic."
Celeste shrugged. "I don't hate it. I'm more annoyed about the total lack of trust."
"Well... I hate to admit it, but we did almost commit a small war crime when--"
"Only almost. And it would have been very, very small." Celeste waved her fingers breezily. "We've matured since then anyway. We can handle ourselves on our own for a little while. We're practically independent."
"Except for still living with our parents."
"Well the housing market's shit. We can't help that."
"That's fair," Lucin said. "That's a very good point."
The siblings stared at their 'nanny' for another moment.
"Do you think she's on?" Celeste asked. "It would be kinda funny if Mom and Dad left and this thing's not even working."
"How would one tell?"
"Beats me. Maybe ask her to do something?"
Lucin shrugged and cleared his throat. "Robot! Get me... a glass of water."
"A glass of water?"
"I couldn't think of anything goo--"
--Hello--
"Ahhh!"
"Fuck!"
Lucin and Celeste jumped back as the robot's eyes lit up and she adopted a new pose.
--I am pleased to meet you. I am Matilda--
Lucin unfurled himself slightly from his defensive stance. "You're... Matilda?"
--Correct--
"Is that... is that the name you came with?"
--No. It is the name I was given--
"Mom," Celeste said. "That sounds like a name she would have chosen."
"Most probably, huh?"
--I am here to take care of you--
"Er, very nice, but we don't need any help, actually," Celeste said. "We're very good at not dying."
"Been doing it all our lives," Lucin agreed eagerly.
Matilda didn't move.
"So, uh, just stand there, I guess," Celeste said. "Well done. Great job. Ten out of ten."
"We shall give you a glowing review upon our parents' return."
Matilda continued to not react. The sibs watched her carefully, then slowly backed out of the room.
"Well, could be worse," Lucin said.
"It's a bit... weird," Celeste said. "Having her in the house with us."
"A bit, sure. But seems harmless enough."
"Let's hope so. You think she'd stop us throwing a party if we wanted to?"
"Do we want to?"
"Not really. Just hypothetically."
"No idea," Lucin said thoughtfully. "It'd almost be worth trying just to find out."
"Mmhm. Almost. But we don't throw parties."
"No, too much work. I mean, the incident wasn't even our fault. Everyone just decided we were having a party. We certainly never said we were."
"Right. That shouldn't keep getting held over our heads like that."
"Right. So, uh... now what?"
Celeste and Lucin both thought for a moment.
"I guess just... do our thing?" Celeste suggested. "Hopefully 'Matilda' doesn't think we have bedtimes."
"If she tries to put me in diapers and throw me in a crib, I'll...."
"You'll what?" Celeste asked pleasantly.
"... I'll not be very happy."
"No. No you probably wouldn't be."
****
Matilda wasn't too big a deal really, at least at first. It was obnoxious to be babysat like that, but Celeste didn't let it get to her. Plus for a robot nanny, she cooked a rather nice supper, so at least there would be an upside or two.
What absolutely infuriated Celeste, however, was when she went to masturbate that evening. It should have been a nice, simple, private affair the way it usually was. Instead, she'd only just lain down on her bed, bottoms off, sexy images in her mind, and fingers just barely teasing her pussy before she was interrupted.
--Do not do that--
"The fuck?"
Celeste jerked upright, horniness briefly forgotten, but there was nothing further to be heard. She shrugged and lay back again, and again sent her hand to her pussy.
This time, almost immediately, her door crashed open. And it had been locked. Apparently not much of an impediment.
--Do not do that--
"Jesus fuck! Get out! What is this?"
--Do not do that--
"Yeah, I fucking heard. But are you serious though?"
Matilda appeared to think for a moment.
--I am always serious--
"I bet you are. What am I not supposed to masturbate or something? First of all, how could I possibly know that? Second of all, what kind of puritanical nightmare scenario are we talking here? If this is some kind of joke it's--"
--I never joke--
Celeste sighed. "You don't say."
--Unless you would like me to download a joke subroutine--
"I... not just now, perhaps. How about disabling this anti-masturbating subroutine? How 'bout that?"
--Access denied--
"Seriously?"
--I am always serious--
"No, I got it, thanks." Celeste growled miserably. "Can you get out now?"
--Yes--
Matilda turned and left. Only just at the hallway, her head jerked in an odd, unnatural movement.
--Do not do that--
"I didn't do anything!"
Fortunately, sort of, Matilda immediately stormed off away from Celeste's room. Toward... Lucin's?
Celeste smiled humourlessly. Well, at least it wasn't just her. This was a problem, sure, but at least it wasn't a sexist one. Like boys could fap but girls couldn't.
Still, something had to be done.
Celeste listened to the noisy argument, trying to judge when she should slip over to see her brother.
****
"There's nothing wrong with masturbating!"
--Do not do that--
"I heard!" Lucin said irritably. "And you broke my door! You gonna fix that or what?"
--I do not have a carpentry subroutine--
"So--"
--One can be downloaded--
Lucin rolled his eyes. "Fine. Download a carpentry subroutine. And while you're at it, how 'bout ditching the eighteenth century morality filter."
--Access denied--
"Fuck!"
Lucin curled up miserably on his bed until Matilda left. This was not a promising development. Not at all. No privacy, and specifically no masturbating. How long were their parents gone again? He missed them already.
"She got you too, huh?"
Lucin peeked up. "Yes."
"Kind of obnoxious, I thought."
"Me too." Lucin tilted his head. "Are you wearing anything other than that shirt?"
Celeste snapped her fingers. "Focus! I know you're horny. I am too. But now's not the time."
"It wasn't about being horny. Just asking."
"Yeah, well, you know I can see your dick. I didn't bother you about that, did I?"
Lucin, without hurrying to do it, pulled his blanket over his lap. "I was harder than this, you know. Until I got busted in on."
"That's... really not the point. At all."
"Just sayin'."
Celeste sighed. "Boys and their cocks," she muttered.
She sat down opposite Lucin on his bed, carefully positioning her legs so as not give a lewd peek up her shirt. It really was too small to be wearing it by itself around the house, but she had bigger priorities at the moment. Besides, it was only Lucin. Not like their parents were about. And the nanny-bot had already seen a good eyeful as it was.
"What are we gonna do?" Celeste asked.
"I dunno. Not masturbate I guess?"
"That seems like a good solution, does it?"
"Not even a little bit. I just don't know what else to do. She won't let us change her program."
"So I noted."
Lucin threw his hands up. "So what, then?"
"I don't know. But let's work together on it, ok? We can take her. Somehow."
"Like in a physical contest?"
"Probably not. But in a battle of cunning, surely we could."
"I like your optimism," Lucin said. "Now, would you mind terribly averting your eyes while I find my underwear?"
"I've seen it already, you know," Celeste said, dutifully turning around anyway.
"Not the point."
"Principle of the thing?"
"Principle of the thing."
Celeste turned back around when she judged her brother would be halfway decent. He was still stepping into his jeans, but at least his boxers were on so he wasn't flashing anything untoward. Other than a bit of a tent from his aborted masturbation session, of course. Celeste's lips curled up slightly, even though there really wasn't much enjoyable about this whole situation.
"I might do some research on the model," Celeste said. "Maybe it's a bug."
"Doesn't seem like a bug. But maybe it's some bizarre-ass feature. Maybe there's a switch on her back or something."
"Yeah. Maybe. You gonna look for it?"
Lucin sighed. "Almost might as well. Need something to distract myself."
"Mmhm. That boner's not disappearing quickly enough, huh?"
"No. No it's not."
"Having trouble getting it in your pants, huh?"
Lucin sighed and gave up, kicking his jeans back off. "The commentary isn't helping, you know."
Celeste grinned. "Sorry."
"No you're not. You're lucky. You can be as horny as you like and won't have any wardrobe trouble."
"Oh, I wouldn't say that."
"No?"
"No. You ever been so wet you soaked right through what you were wearing?"
"... obviously not. Have you?"
Celeste's grin remained, but became more impish and perhaps just a little rueful. "Once or twice."
"Seriously?"
"To be fair, it's only really a problem with certain specific outfits. And if I somehow get crazy turned on while wearing them."
"Like if you don't wear panties or something?"
"Hehe, what, you speculating on your sister's habit of not wearing underwear?"
"You started it." Lucin shrugged like he didn't care, but then slowly turned back to Celeste. "But really, no panties and thin bottoms? Something like that? Leggings maybe?"
Celeste smirked. "Not telling."
"Ah! Tease!"
"Shut up. You're just horny. You don't actually want to know."
"Grrr, maybe not. I don't know. I'm just really confused right now. You know you flashed your pussy when you first came in, right? And you've been sitting there like you're gonna do it again."
"Ok, no, I'm carefully sitting so as not to flash you. And also... I didn't mean to flash you, if that's any help."
"It's not really." Lucin shrugged miserably. "It's a nice pussy though, from what I saw."
Celeste's heart beat a little faster. This really wasn't helping her not want to masturbate. "Thanks. Your cock looks pretty nice too."
"Uh, thanks. Is this weird?"
"Obviously."
"Yeah. I'm gonna... go do... things."
"Good choice. I might do things as well."
The sibs stared at each other.
"I just really want to masturbate," Lucin whined.
"Yeah," Celeste agreed, "me too."
****
Things didn't get any better over the next few days, neither for the siblings, nor for the doors in the house.
Lucin tried jerking off in their parents' room, under the assumption Matilda might not bust down the door. No luck.
Celeste tried the bathroom, including in the shower and only using the spray to hit her clit. It didn't go any better.
"So much for privacy, huh?" Lucin said.
Celeste swore viciously and repeatedly as she toweled herself off. "This bitch!"
"She--"
"I wasn't even touching myself, you know. Just using the shower head. She still knew!"
"Oh."
Celeste looked up. Her brother appeared thoughtful, and also slightly embarrassed. "You could turn around until I cover up, you know."
"I could."
"Luce, I'm naked here."
"Yes, you are."
"Luce!"
"Sorry, sorry. I'm incredibly horny, is all."
"And how's perving on me going to help that?"
"It's not," Lucin groaned. "It's entirely unhelpful. I didn't mean to. I just heard the door come down, and when I came over, you were...."
"Trying to towel off?"
"Yeah."
"Get a good look, did you?"
"Very good look, thank you. Again, accidental. Just for the record."
"Which might be a point in your favour, except for you kept staring after."
"Yeah, well... I mentioned about being a horny little thing, didn't I?"
"Yeah," Celeste sighed. "You did."
"Are you done yet?"
"Nope. Keep watching that wall."
Lucin folded his arms. "You know, I've thought about doing it outside somewhere. Surely Matilda couldn't police us if we're far enough away."
"That's... not a bad idea."
"It's the beginning of an idea anyway. Just, like, I don't want to be one of those guys arrested for jerking off in public."
"No, probably best not to get caught, that's for sure," Celeste said thoughtfully.
She toweled off slower as Lucin continued to look away. Not that she'd admit it to him, but it was kind of a thrill to stand there casually naked while he had to look away. That was just her horny self talking, of course. She hadn't had a cum in a few days, and she's just been interrupted trying again. Even him staring fully at her a moment ago hadn't bothered her.
Not that that kind of thing was a big deal between them anyway. They were used to pretty good privacy, but living together meant there were little peeks and glimpses here and there. They'd each accidentally caught the other masturbating more than once, for instance, and it had never been a big deal.
Their parents had always generally been pretty open and honest about sexuality and such things, which was in fact part of the reason this whole masturbation ban was such a confusing mess.
"I kinda wish I had a girlfriend," Lucin said.
"I don't know if sex would be allowed any more than masturbation."
"Maybe not. But we could go to her house and do stuff."
"Oh yeah, that would be easier, wouldn't it?"
"Mmhm." Lucin shuffled awkwardly as a thought occurred to him. "Hey, Cel, I just had a really, really bad idea."
"Oh?"
"It's really bad. Like really b--"
"I got it. Tell me."
Lucin turned around. Celeste only half-heartedly bothered to cover herself with her damp towel.
"We don't really know that sex would be off limits. Maybe it's just masturbating."
Celeste sucked in a sharp breath. "I mean... you're right, we don't. What are you suggesting?"
"Like... what if... just to try it... what if I touched you?"
Celeste's legs wobbled a bit before she got a hold of herself. It was a bad idea. He wasn't wrong about that. But why did it make her all warm and tingly to think about? Other than obvious overload of arousal lately that she couldn't do anything about. Vibrators and shower heads hadn't worked. Maybe... maybe her brother's fingers would?
Oh god, even thinking about it. So bad. So... exciting.
"Try it," Celeste said hoarsely.
"Really?"
"Don't look all excited at me like that."
Lucin coughed and tried to tone down his enthusiasm. He really hadn't meant for it. It wasn't like he wanted to feel up his sister. Just to test it, was all. He hated to admit the sudden surge of elation through him when Celeste said yes.
Like yes, ok, catching her naked just now had been exciting in a way it shouldn't have been. But that was just horniness and surprise. He shouldn't actually want to touch her. Nor should she want him too.
Celeste dropped her towel, holding it loosely in one hand. Goddamn she was so... naked.
"You got a bit of a boner there," she remarked almost casually, but with a small quaver in her voice.
"I do," Lucin admitted.
"Gonna touch me or what?"
"Just... for science."
"Right. For science."
Lucin moved forward. Celeste rocked back like she was going to step away, then stood her ground instead.
Celeste's heart pounded. Her clit throbbed. God, it was like some boy she had a crush on about to touch her, not her brother.
Lucin's fingers trembled as he reached out. He tensed just before touching Celeste, then let his hand meet her breast. Both siblings sighed in unison at the contact.
They stood totally still for a moment.
"I don't hear her," Celeste said.
"Me either."
Lucin fully cupped Celeste's breast. Still no robotic warnings to be heard. He reached up with his other hand and cupped both her breasts at once. Still nothing.
Celeste bit her lip and fought not to make any embarrassing noises as her brother played with her tits. It felt way too good. She hadn't been touched by anyone else in too long, clearly. Plus her inability to get off lately, of course. But Lucin really might be on to something about needing a boyfriend, or at least a fuckbuddy.
Unfortunately, she had no candidates lately, nor did she have anyone she could set Lucin up with as a girlfriend. Plus, much as it pained her to admit it, she didn't really want to set him up with anyone if she was single. Just the possibility of having his hands on her like this....
That was bad thinking. Bad, bad thinking. Honest, yes, but bad.
"My pussy," Celeste whimpered.
"Hm?"
"Try my pussy. See if you can touch it."
"Oh shit, right."
Lucin jolted back to reality after the magic of fondling his sister's boobs. He was desperately aroused now, and with no real hope of doing anything about it, but that didn't mean he was going to act sensibly. He'd feel more embarrassed about his enjoyment if Celeste wasn't as clearly turned on as he was.
His hands dropped, but didn't quite leave Celeste's suddenly fascinating body. He wasn't really sure it was ok, but he also couldn't help trailing down her warm body, unwilling to let go entirely.
Celeste hissed in a breath and felt her eyes roll back for a moment before regaining some control. Being touched was often nice and all, but this was excessive. Especially coming from her brother of all people.
And he was only getting closer to her pussy. She braced herself for that, hoping not to dreadfully embarrass herself with her reaction.Lucin swallowed hard as his hand traveled the last bit of its forbidden journey and closed on Celeste's pussy. He actually moaned softly as he felt her wetness, then her heat as he closed his hand over her naughty little slit. Luckily he heard a moan from her as well.
They just barely had time to look at each other before interruption.
--Do not do that--
"Fuck!" they said in near unison.
Lucin yanked his hand away, then looked to Celeste. As one, they started laughing, dissipating some of the tension.
"Well, so much for that," Celeste said.
"Yeah," Lucin said, awkwardly scratching the back of his head. "Guess that won't work. I mean, not that we'd really do anything with it anyway."
"... right, yeah."
Celeste shuffled her feat, unsure what to do now. Belatedly, she remembered her towel and wrapped it around herself. The disappointment in Lucin's eyes as she covered up mirrored her own. But they just couldn't be too crazy here. This had just been testing, was all. Even if it felt really, really good, and she was going to drive herself crazy thinking about it.
"Your boobs are nice," Lucin said, feeling the need to say something, but unsure what he could possibly contribute at that point. He immediately regretted his choice.
Celeste snickered, even though her cheeks were still flushed from Lucin's touch. "Are they really?"
"I mean... I don't know why I said that."
Celeste's eyes flashed down to the tent in Lucin's pants. "I do."
Lucin went even redder than he already was. "I just... I'm horny."
"I see that."
"So are you. I had enough time to feel that much."
"... shut up. Maybe."
"Definitely. My hand's still wet, and it was only on there for--"
Celeste made an annoyed noise. "This is gonna be terrible, isn't it?"
"What is?"
"This!" Celeste said, waving her arms, nearly setting her towel free with the wild movement. "I let you feel me up just now! My bro-ther. I mean what the fuck?"
"And... and it didn't even really help. We're just worse off now than before."
"Right. It's a problem." Celeste sighed and fidgeted with her towel. Then an idea occurred to her, and she was sufficiently grateful for it that she didn't stop to think it through. "Right, let me get dressed."
"I--"
"We're going out."
"We are?"
"Yes."
"Why?"
"Just trust me. I think I have a temporary, somewhat inconvenient solution."
Celeste brushed past her brother, and in the process her poorly fastened towel came off. She ignored it and marched straight to her room.
Lucin watched her go, feeling yet another painful twitch from his cock, and a helpless whimper from his lips. Celeste's nude, retreating form was too much for him right now. Had her ass always looked that good? It couldn't have, right? Or was he only just now noticing?
"Just circumstances," he muttered under his breath. "That's all. That and... and she's naked."
Nakedness counted for a lot, after all. Maybe too much in this instance.
****
"So, we're at a restaurant," Lucin said.
"Right," Celeste agreed. She still wasn't happy with her hair. She'd only thrown together an outfit and put it up loosely, just trying to hurry things along, but she kind of wished she'd spent enough time to make sure her hair looked good. It left her kind of distracted now.
"So... what's the genius plan?"
"Just give it a minute. Let the waitress bring our drinks and we'll order some food. Be patient."
"I'm not even hungry. I just... I need...."
Celeste felt a pang from her clit at the obvious need Lucin displayed. It brought her attention back from fussing with her hair to the whole point of being here. She kind of wished she could have remained distracted a little while longer. She wasn't really comfortable with the way she kept looking at her brother when her mind was in a naughty place. And the way he looked at her wasn't helping either.
"Just trust me," Celeste urged.
Lucin growled and squirmed in his seat, but did his best to be patient. "We're not, like, trying something stupid here like seducing the waitress, are we?"
"Ha, no. Obviously not. She's just trying to do her job. She's not part of the plan."
"... you're not going to tell me, are you?"
"Be patient."
Lucin found it nearly impossible to sit still or quiet his mind. He was horny as fuck, and sitting across from Celeste all he could think about was her without her clothes on. She'd been radiantly naked not so long ago, and his hands had been on her, so warm and inviting....
Aaannnd she was his sister. He was effectively on a date with his sister, having just seen her naked and felt her up. What was even happening?
Luckily, he didn't have to wait long. Indeed as soon as they'd ordered food and thanked their waitress, Celeste was moving and dragging Lucin along behind her.
"Where are we going?" he asked.
"The bathrooms."
"The... bathrooms?"
"Yeah. We'll just have a quick cum in there and feel much better for it."
"That's the plan?!"
"Yes."
"Good lord. I can't...." Lucin stopped and lowered his voice, suddenly recalling the many ears around them. "I can't jerk off in a bathroom."
"Why not? They're private. More or less."
"It's weird! And what if someone walks in?"
"They won't. They have single person bathrooms here. Lock the door, all set."
"Oh. Well... that helps, I guess."
"Mmhm. Get some porn on your phone if you have to. Make it quick."
Celeste pushed Lucin toward one bathroom, then went for the one directly across from it. It was occupied. Undaunted, she spun around and barged in with Lucin before he could lock her out.
"Seriously?" he hissed.
"Someone's in the other one. Just lock the door."
Lucin's fingers trembled slightly as he made sure the door wasn't going to open unexpectedly on them.
Celeste started pulling her pants down, but hesitated as she watched her brother.
"You saw me naked already," she said.
"Is that meant to convince me or you?" Lucin asked all too perceptively.
Celeste flipped her hair. "It's no biggie, really. Nothing either of us haven't seen."
"You're worried though, aren't you?"
"Maybe. Are you?"
"Yes. Cel, Mom's right. Neither of us take much of anything seriously. And that's kinda her and Dad's fault, a lot of it. Just the way we were raised. But I worry about how much I want to see you take your clothes off again."
Celeste flushed at Lucin's words. Her fingers fidgeted with her jeans. They were down just far enough to expose the top of her panties.
"Some things are important," she said. "Doesn't matter who you are, some things always matter."
"Like family?"
"Yeah. Like family. But Luce, this isn't going to break anything. It's just something we need."
"Lots of people don't masturbate at all."
"So they say." Celeste shrugged. "And even if they aren't lying, not everyone's as horny as we are."
"That's probably true."
"I mean, what are you usually, like, twice a day?"
Lucin smirked and looked away for a second. "Maybe more," he admitted softly.
Celeste smiled cautiously back at him. "Same. It's been torture the past couple days. I don't care if people live like that, we don't have to."
"So we steal away to restaurant bathrooms everyday?"
"If necessary."
"And watch each other get off?"
"Well... we don't have to watch. But--"
"But we will though," Lucin said.
"Yeah," Celeste said faintly. "We will."
There was a long, uncertain pause, then as one the sibs worked at their pants and pulled them down out of the way. Celeste leaned up against the sink and yanked her panties down. Lucin tried to find a comfortable spot leaning against the wall as he got his cock out.
"This might be the dumbest thing we've ever done," Lucin said, though he started stroking himself as he said it.
"Nah. We've done dumber," Celeste said.
"Yeah, ok, but...."
"But what?"
"I dunno. I got distracted."
Celeste grinned. "By my pussy?"
"Mostly that, yes."
"Good."
The sibs continued closely observing one another as they stroked and rubbed themselves. It was so liberating to be allowed to get off again, and quite a rush to do so in a semi-public place like this, let alone doing so opposite each other.
The horniness took over. It wasn't long at all before neither of them was even slightly concerned about the consequences of their decision, and were instead only interested in seeing more of the other.
"Take... take your shirt off," Celeste said.
"I will if you will."
Celeste nodded and stopped rubbing herself for a few precious seconds in order to get her top and bra off. Lucin was quicker at whipping his shirt off and getting back to jerking off to his sister.
Celeste's whole body felt like it was on fire. Showing off for her brother like this, seeing the lust and appreciation in his eyes, and of course the way he rapidly stroked himself while staring at her. She'd never been so turned on.
Lucin was in much the same emotional place. This was so damn naughty, so very inappropriate, and all he could do was keep playing with himself. He was getting off to his sister, fully and mostly unashamedly. She was practically naked for him, as he was for her, and they were both leaning into it more and more.
"Luce?"
"Hm?"
"Do you want to, like... you know earlier when you touched my boobs?"
Lucin groaned. "Yeah. Yeah I remember."
"Do you... wanna do it again?"
"Really?"
Celeste nodded. "Yeah. Really."
Lucin moved in and used his free hand to feel his sister up. Again.
Celeste whimpered and rubbed herself frantically, feeling the edges of a much-needed cum. It was so intense now, they were so close together. Lucin... he might actually cum on her. He was right there. He might....
"Oh god," Celeste whispered.
She came hard and overwhelmingly, riding the high, continuing to rub herself, making it last as long as she could.
Midway through, awed at the sight of his sister getting off and the softness of her breasts under his hand, Lucin came too. He threw his head back and let the relief of an orgasm wash through him and take him to purest bliss for one long beautiful moment.
The aftermath was a little less pure and delightful, but not as awkward as perhaps siblings cumming together should be.
"You got cum all over me," Celeste said.
"Sorry."
Celeste shrugged. "Accidents happen."
Lucin smirked crookedly. "Yes. They do."
Celeste started pulling her clothes back on without wiping up any of the mess on her skin. Lucin followed suit, glancing frequently over at her in the process. Celeste sneaked peaks right back.
"So... now we gotta go eat like everything's normal?" Lucin asked.
"I don't know about you, but I'm hungry."
"... I could eat."
They returned to their table, slightly disheveled and much more relaxed. Their food was waiting for them.
"How long do you think we took?" Celeste asked.
Lucin shrugged. "Not that long, I think. Hard to say though. I was... distracted."
Celeste grinned. "I bet you were."
As Lucin started eating, he felt something up the side of his leg. He looked across to Celeste, who was still grinning at him as she took small, careful bites.
"You gonna play footsie with me now?" Lucin asked.
"This isn't footsie. I'm just... distracting you some more."
"To what purpose, dare I ask?"
Celeste shrugged. "No purpose. Just fun."
"Ah. Well... I'll allow it."
"Because I let you cum on me in the bathroom?"
"Partly that, yes."
"And you kinda liiike iiittt?"
"Maybe that too."
Celeste laughed and kept rubbing Lucin's leg with her foot. It wasn't something she'd normally do to anyone, really. But somehow she just liked getting a reaction from him, and more importantly keeping his attention firmly on her. She craved her brother's attention right now. Probably because of what they'd just done together.
"Hey, do you think when we're done..." Lucin said.
"Yeeesss?"
"Do you think when we're done, I could... cum on you again before we leave?"
Celeste smiled so hard it hurt. "I don't see why not," she purred.
After they finished eating and paying the bill, the sneaked off to the bathroom again. Celeste knelt down in front of Lucin this time, looking up with sexy intent as he got his cock out.
"Oh god, Cel."
"Hm?"
"You know that just makes me want to cum on... on your face."
"Yes. I thought it might."
Lucin nodded as he stroked himself. "Well as long as you're aware."
It was a whole new view of his sister. He'd seen her more naked, and just as horny, but never quite as... sexual. Celeste looking up from her knees, hand jammed down her pants, waiting for cum all over her face. It was a sluttier side of his sister than ever before, and he really kind of liked it.
Celeste rubbed her pussy with quiet need as she stared at her brother's cock in her face. She hadn't realized quite how close it would be, somehow, and it was altogether too tempting to give it a little lick or something. Or... or suck on it.
Her thoughts were going to help get her off again, even if they were too much. Or were they though?
Celeste, in the throes of incestuous masturbation, stuck out her tongue and licked Lucin's cock. Just on the tip. It tasted of precum, all salty and sexy.
"Cel!"
"What?"
"You licked me!"
"I know."
"... do it again?"
Lucin, having previously thought things couldn't possibly get any hotter, now groaned as Celeste smirked up at him and leaned in to kiss the tip of his cock. She made such sensual eye contact with him the whole time as she semi-randomly kissed or licked his cock while he jerked off to her.
"You liiike that?" she asked.
"Of course."
"That's baaaddd."
"I am aware."
Celeste bit her lip. "Are you gonna cum?"
"Yeah. Soon."
"Good."
She rubbed herself faster, her hand fighting the resistance of being trapped in her pants. She kind of wished she'd taken them off, or at least pulled them more out of the way.
Lucin shivered and exploded, much to his sister's surprise and delight. Her shock only lasted a brief second as the first of his cum struck her cheek, and she squealed happily as more and more landed on her.
Celeste's eyes rolled back and she finished herself off to the feel of hot, brotherly cum splattering on her face. Goddamn she loved this so much. She shouldn't, probably, but she really really did.
Lucin gave Celeste an awkward hand up after, getting her back on her feet. They each tucked themselves back in their clothes, blushing mildly but smiling uncontrollably.
"Hey Cel, what if you didn't wipe that cum off before we leave?"
Celeste's eyes flashed. "Seriously?"
"I dare ya."
"Oh you're bad. The whole point was to stop being horny for a little bit, you know."
"Yeah well, this seems like more fun."
"Mmm, you're kind of annoyingly right."
After straightening up a bit and giving Celeste a chance to examine herself critically in the mirror, they sneaked their way out of the restaurant. Lucin went first, sheltering Celeste from view as she stayed close behind him. No one paid them any real attention, and really no one would have any reason to stare intently at Celeste in the first place. But if someone did happen to notice the cum dripping down her face....
"Can't believe you made me do that," Celeste said, lightly punching Lucin's arm as they made it to the car.
"I didn't technically make you do it."
"Hmph. Sure you didn't." Celeste grumbled as she started the car. "I'm gonna be horny again now."
"Me too, if that's any consolation."
"It is a little, actually."
"Maybe next time I should cum on your face before we eat, so we can get it out of our systems."
Celeste snorted. "Nice try, but I'm not sitting there calmly eating dinner with your mess all over my face."
"Why not?"
"Tell you what, you can cum on your own face, how 'bout that?"
"... I'll pass."
"Thought you might."
****
The sibs made it through several days with their new strategy of leaving their house to masturbate. It wasn't a totally satisfactory solution by any means, especially when the initial thrills wore off and the danger of getting caught being total pervs remained. It was still fun and risky and all, but not the same high as the first time.
Worse, Celeste and Lucin's increasing comfort around each other kind of backfired, as a lack of proper attire led to them both being hornier more often.
"Do you have to walk around with boners all the time?" Celeste asked. "You never used to do that."
Lucin shrugged. "I mean, you've seen it. No big deal, is it?"
"It's distracting."
"Well maybe you should put a shirt on then. That would help with the boners."
Celeste shrugged. "You're not wearing a shirt. Why should I?"
"You've got nice boobs. That's the difference."
"Pff, just sexist hypocrisy is all."
Lucin shook his head. "It's really not. You like me staring at them. You know exactly what you're doing."
"Maaayyybe."
"Uh huh."
Matilda ignored the both of them as she prepared breakfast. The good news, such as it was, was that their robot nanny didn't mind most lewd or inappropriate behaviours. Just masturbating, mainly. And presumably sex and stuff too, though they hadn't tested those out properly.
They had pushed the limits a little, just to see. Celeste had given Lucin's cock a few experimental kisses, which hadn't been allowed. Nor had Lucin kissing Celeste's pussy been allowed. He'd tried licking as well, which hadn't gone any better.
"What if we just disabled her vocals somehow?" Celeste grumbled, staring daggers at their watchful guardian.
"Then she'd still stare at us," Lucin said. "And for all we know, she'll get physical if we're not careful."
"Ah, but she might not." Celeste cleared her throat. "Matilda, disable vocals."
--Access denied--
"Of course it is."
Lucin gave it a shot. "Matilda, what behaviour exactly is prohibited?"
--Access denied--
"Grrr."
Celeste sighed heavily. "I know, right? This is only going to lead to more unhealthy behaviours in the long run. I don't understand the logic of it."
"Right? Masturbating's practically one of the healthiest and safest things out there. But oh nooo can't play with your own cock if--"
"Or pussy."
"--or pussy if you want to. Some jackass designed these robots that way for 'moral' reasons I bet."
"Much hate," Celeste agreed.
Matilda, engaging in one of her redeeming qualities, set plates of breakfast in front of the grouchy siblings.
"At least she cooks good stuff," Lucin reluctantly admitted.
"The food's been good alright."
"So maybe... maybe it's not all bad."
"Not entirely, no."
Celeste ate quietly for a moment, an idea forming in her head. "What if...."
"Hm?"
"What if... you know how Matilda really only gets annoyed if we play with ourselves?"
"I am aware. That's our whole problem."
"No, but I mean, like, she doesn't say anything if I play with my boobs."
To demonstrate, Celeste cupped her tits and bounced them. Nothing happened. She pinched her nipples and rolled them, still nothing.
Well, not nothing. Lucin's jaw dropped and his eyes fixed solidly on her chest. Celeste had to try not to smile to hard at his reaction.
"See?" she said.
Lucin tried to shake himself out of it. Celeste just sitting there playing with her boobs in front of him, that wasn't fair. Like he needed to be hornier.
"She didn't say anything," he agreed, trying to act nonchalant even though that ship had sailed.
"Now you try."
"... feeling your boobs?"
"Ha, no, silly. Just... I dunno, play with your nipples or something."
Lucin frowned. "Is this some weird kink of yours? 'Cause my nipples don't do much for me."
"Really?"
"Yeah. Really."
"Huh. Weird. Anyway it's just for testing purposes. Doesn't matter if you actually like it or not."Lucin thought about it, then shrugged and fingered his nipples some, trying not to overthink whether Celeste was actually enjoying him doing that sort of thing to himself. Probably she wasn't. It wasn't the same effect when a boy did it as when a girl did. Totally different.
Most of the time he would have been right. However, in the context of being overly horny herself, Celeste kind of enjoyed the display anyway. Which hadn't been her goal, she really did just want to test things, but a little extra sexiness might as well be enjoyed as long as it was in front of her.
"So she doesn't mind that, is the point," Celeste said, trying not to appear as though she'd been staring too hard at her brother.
"Yeah, fair enough," Lucin said. "If you can get off to nipple play, more power to you."
"That's not really what I was thinking."
"What were you thinking then?"
"I was wondering how Matilda feels about anal."
Lucin took quite a while to process the statement. His mouth opened and closed a few times as he almost said something, then thought better of it. His eyes flicked to Celeste repeatedly, drawn to her boobs, but also to the tabletop in front of her as though he could see through it.
Celeste waited patiently but with growing nervous excitement for him to catch up to her.
"Like if you put stuff in your butt?" Lucin asked.
"If either of us did," Celeste corrected.
"You think I'd do that?"
Celeste rolled her eyes. "Please don't tell me you're one of those people who thinks butt play for guys is exclusively gay."
"No! Of course it isn't. Just... I've never really done it."
"Oh really? Found something you're shy about, did I?"
"I... maybe. Whatever."
Celeste, eager to tease her brother, nevertheless reined herself in. She wanted them working as a team, after all.
"Ok so... me either, actually," Celeste admitted.
"And you were gonna tease me?"
"I know, I know. It's just instinct sometimes. Anyway... what do you think would happen?"
"I dunno. It's not really masturbating, is it?"
"Don't see why not. People can cum from it."
"Just in porn though," Lucin pointed out.
"If they can do it in porn, they can do it in real life. It's not all fakery, you know. You can see when dudes cum for real. And if a girl squirts like crazy, kind of hard to fake that, I'd think."
"Have you... watched a lot of this stuff?"
"Some. You?"
"Same, I guess. I kinda have periods of being more interested in it sometimes. Sometimes I watch a lot of butt stuff. Sometimes I don't."
"Fair." Celeste toyed with the food remaining on her plate. "So... should we try it?"
Lucin struggled with his answer. He wanted to say yes and no at the same time, and both pretty strongly. The decider for him was the near-certain knowledge that he'd get to see Celeste playing with her butt.
"I'm too horny for my own good," he said aloud.
"I think we've both known that about ourselves for a while. That's a yes then?"
"Yeah, let's try it."
"Cool." Celeste bounced to her feet. "Let's go."
"Now?"
"You mean after we've had time to think about it?"
"... you're right, let's go now."
Lucin darted from the table, followed closely by Celeste. It was, perhaps, rude to just leave their dishes on the table like that, but then Matilda had been quite rude in not letting them masturbate, so the hell with her.
"Whose room?" Lucin asked.
"Mine, I guess. I need to get a shirt."
"Why do you need a shirt?"
"Because," Celeste said as she entered her room and rifled for a top. "I'm gonna be quite exposed."
"You're already quite exposed."
"You just wanna see me naked," Celeste accused.
Lucin nodded. "I mean, yeah, obviously. Do you not want me to see you naked?"
"I... I'm not used to showing anyone my butthole."
"Oh. Yeah, I guess not, huh."
Celeste pulled on a loose shirt that came down just past her panties. When she removed her underwear, Lucin couldn't quite catch a peek of her pussy, no matter how hard he stared.
Celeste smirked at her brother's inquisitiveness, but was simultaneously bouncing with nervous excitement.
"Ready?" she asked.
"Why you asking me? You're the one doing it."
"You're gonna try it too! Don't think I'm the only one gonna play with my butthole."
"Fine. You first though."
Celeste rolled her eyes, but accepted the condition. She'd kind of expected it anyway. She wasn't sure if she could get Lucin to do butt stuff to himself period, really. Boys could be funny about things like that. Although girls could be equally weird about it, so maybe it was just people generally.
Lucin tilted his head with interest as Celeste reached behind herself. He couldn't actually see anything, but the overt implication of what she was doing was certainly intriguing all on its own.
"Are you touching it?" he asked.
Celeste nodded, slightly breathless despite a distinct lack of physical exertion. "Yeah."
"Well... seems like no reaction then."
"Certainly does. But, like, I might have to actually go inside to trigger something."
"You think? How sensitive is Matilda anyway?"
"No idea. I assume she's got some crazy senses though. I mean she can sniff out masturbation behind closed doors and everything."
"True. And she doesn't actually trigger when you're, like, using the bathroom or anything."
"Yeah. Too bad I don't have any lube to try out right now. Maybe spit?"
Lucin fought a small wave of arousal. It wasn't doing any good. He was turned on as it was, and it was only getting worse the more Celeste 'tested' her butthole.
"I've got some," he volunteered.
Celeste looked up sharply. "You do?"
"Yeah."
"I thought you didn't do butt stuff before?"
"I haven't."
"Then what's the lube for?"
Lucin stepped back under his sister's sudden, intense scrutiny. "It's, uh, you know like toys for jerking off? Like, that are supposed to be kind of like pussies or whatever?"
Celeste nodded. "Oh. Those."
"Yeah."
"Well go get the lube then. I don't want to stand her with my ass hanging out all day."
"I--"
"I know you'd enjoy it," Celeste said with a perfectly executed eye roll. "Just get the lube."
Lucin dashed off. He passed Matilda in the hall, who continued to not give a single shit about any lewd behaviours in the house, other than genital gratification. She was such a weirdo.
"Got the lube," Lucin said.
Celeste grabbed it from him and poured a little on her finger. She again reached back behind herself and rubbed her finger over her butthole.
It had never seemed necessary to play back there before. Vaginal stimulation had always been fun enough on its own. But now, without her previous options available, Celeste was kind of enjoying this new naughty touch. Fingering her little bum like this. In front of her brother and everything. It felt so dirty in a really good way.
"Is your finger in?" Lucin asked.
"Mmhm."
"Well Matilda was just down the hall, and she clearly isn't minding this."
"It seems not," Celeste said faintly.
"... how's it feel?"
"You should try it."
"I will. Just... what's it like?"
Celeste snorted. "What do you think it's like? It's like a finger up the bum."
"Yeah but... do you think you could masturbate like that?"
"I don't know. I mean, it feels kinda nice. And weird. But, like, I honestly don't know if I could cum from having things up my butt."
"Only one way to find out."
Celeste grinned. "True. You try it now."
Lucin swallowed, then nodded. He had to do it or he'd be taunted mercilessly. And really, he privately was kind of happy to have pressure to try it. He didn't know if he would on his own.
Lucin pulled off his pyjama bottoms, leaving himself naked, not even the protection of a shirt like Celeste had. He didn't mind. He was horny, and the way his sister stared at him was a thrill he was really getting to appreciate lately. He still thought she was more fun to look at naked than he was, but he was biased.
"Damn you're hard," Celeste said without meaning to speak aloud.
"Well yeah."
"So much precum...."
Lucin blushed. "Shush. We're supposed to be experimenting here. Take it seriously."
"I am. You just got naked. What do you want from me?"
"I...."
"I'm way too horny. You shouldn't be so fascinating to me."
"Same," Lucin said.
The sibs blushed and tried to determine where they should look, then just gave up and checked each other out more.
"Do it now," Celeste urged.
Lucin nodded and took some lube on his fingers. He leaned one hand on Celeste's bed while reaching back with the other. He was aware that Celeste was now getting a much better view than he was, and tried to feign nonchalance about it even while his cock pulsed and spurted more precum.
Celeste still had a finger up her bum, but used her free hand to spread Lucin's butt cheeks and get a better look as the tip of his finger disappeared.
"Hey!" he protested.
"Just looking," Celeste said absently. "Definitely seems like we can get away with this."
"Yeah, it does. You don't have to look quite so close though."
"Don't know that I can help myself."
Celeste, way too horny for her own good, kept right on staring until Lucin got embarrassed enough to pull his finger back out of his ass. Slowly, robotically, but with great sense of purpose, Celeste pulled her finger out of her butt too, then pressed it against her brother's tight, slippery little hole.
Neither spoke. Neither had the slightest idea what to say. Their parents would have been amused to find them so speechless, if not for the rest of the circumstances.
Celeste's finger slipped inside her brother. He was warm and tight around her. Just like her own bum, except not her own, obviously.
"How's that feel?" she whispered.
"... you can keep doing it. If you want."
"Ok."
Celeste's finger slid deeper.
"This is... weirdly intimate," Lucin said.
"It is," Celeste agreed absently. "I think maybe it's kinda hot, even."
"Yeah?"
"Yeah. Like if I move my finger in and out like this...."
Lucin gave a small, involuntary moan. It wasn't like it was an insane, intense sensation or anything. But it was new and different, and definitely weirdly intimate.
"What about two fingers?" Lucin heard himself ask.
"Really?"
"I don't know. Will two fit?"
"You tell me. It's your ass."
"I'm new to this!" Lucin protested.
"So am I!"
Further argument was postponed as the heavy footsteps of Matilda approached from outside the room. The sibs froze right where they were as their robot caretaker came right up to the doorway. Matilda, in her deceptively delicate way, reached in and knocked on the door.
"You don't have to knock," Celeste said, rolling her eyes. "The door's broken from your last entry, remember?"
"It's polite though," Lucin said. "Even if the door's off its hinges."
"It's not. It's... it's nothing. It's a useless formality."
--I am doing laundry--
"Are you really?" Celeste said, nonplussed.
--I require your dirty clothes--
"Well have at them then."
Both siblings watched curiously as Matilda strode in, efficiently gathered Celeste's laundry, and marched out again.
"She really doesn't care about you fingering my ass, does she?" Lucin commented.
"Seems not." Celeste turned back to her brother's backside. "So... second finger then?"
"Yes please."
Two fingers was more of a struggle. It wasn't impossibly tight, but tight enough to slow Celeste down.
Lucin started giggling. Celeste, trying to maintain some sense of focus, nevertheless followed him as they both lost composure.
"Why are you laughing?" Celeste said while shaking from repressed giggling.
"You're laughing too!"
"You started it."
"It's...." Lucin paused and tried to take a breath, but kept just giggling despite his best efforts. "I don't know. It's just funny, isn't it?"
"... kinda. Should it be?"
"I don't know. I've never had a sister burying a pair of fingers in my bum before."
"Attempting to bury," Celeste corrected. "Not quite getting there. Keep laughing though, I think it's loosening you up."
"Yeah, that's part of what's funny. Just like, it doesn't hurt like you sometimes think it would."
"Well it's only fingers. They're little."
"True. I don't know. It's this whole confluence of different factors. From like, porn influence, and jokes people make, and how mildly forbidden it is. And all it really comes down to is my sister grumpily struggling to get her fingers in me."
"I'm not grumpy!" Celeste protested, before snickering some more at the ludicrous situation.
"You were grumbling."
"I can grumble without being grumpy. And I was only swearing at your butthole 'cause it won't cooperate right."
"Yeah. Funny."
"Hehe, yeah, ok. Fair enough."
Lucin's butt slowly relaxed more until Celeste was able to easily finger-fuck him with her two fingers. Lucin crawled right up on her bed, leaving his ass in the air, and relaxed and just enjoyed the experience.
"Having a good time, are you?" Celeste asked.
"You know, I really am."
"You're certainly drooling precum."
"Am I?"
"Mmhm. Shame I can't do anything about it."
Lucin sighed. "Yeah, and even though this feels nice, I don't know that I'll actually be able to cum or anything. That might get frustrating."
"Hmph, yeah. I'm kinda worried about that too."
Celeste pulled her fingers out and examined Lucin's butthole. It gaped just a little afterward, but closed up pretty quick. It accepted her fingers back in quite easily though. Celeste alternated playing with it some more, and giving it some exploratory kisses.
"God, I could do this all day," Celeste said.
"Really?"
"Yeah."
"I mean, I know it feels good for me and all, but you're enjoying it?"
"I weirdly am. It's... it's just hot. It's wrong and naughty, and maybe I like making you feel good."
"Oh." Lucin mused it over for a moment. "Can I try on you?"
Celeste's clit, already buzzing, sent a surge of pleasure and anticipation through her just at the mere request from her brother.
"Ok," she said in a faint croak.
"Yeah?"
"Yeah."
The siblings swapped places. Celeste got down on the bed with her butt lifted, her shirt falling toward her breasts and out of the way. Lucin got behind her, and at first could only admire the view.
"It might be just as well we can't do... regular sex stuff," he said.
"Why?"
"Because I'd be far too tempted right now."
Celeste's breath came almost as a pant. "Tempted to do worse than jerk off on me?"
"Yeah. Worse than that."
"Oh."
"You regretting some decisions?"
"Not even slightly."
Lucin grinned and dove in. "Good."
Celeste moaned loudly as Lucin's tongue met her butthole. The instant shivers it sent through her eclipsed her previous thrills. It was insane and kind of scary how badly she was into this.
Lucin, likewise, was addicted from the moment of contact. Or, indeed, from the moment of beholding his sister presenting herself so lewdly for him, so ready and eager for his touch. But definitely after tasting her, at any rate.
"We're in trouble," Lucin murmured.
"Yes," Celeste agreed. "We are."
Not that it stopped either of them. Lucin licked away happily, while Celeste cooed and encouraged him.
Lucin slobbered over his sister's ass before eventually trying to finger her. Sticking his finger up her really was only an afterthought, as he'd been having way too much fun eating her out. The combination of spit and lube let him easily invade her butt.
"Ohh, that's nice," Celeste said. "Try two fingers."
"So quickly?"
"Why not?"
Lucin shrugged. "Alright."
Like with his bum, it took more work getting two fingers to slide smoothly in than just one. They had some more giggles in the process, and Lucin couldn't help pausing in their efforts repeatedly to devote more kisses and licks to Celeste's ass. They did eventually get to a point of him easily finger-fucking her though.
"Mmm, ok, let me do you at the same time," Celeste purred.
"Yeah?"
"Yeah. Get up here."
There was some more laughter and several attempts at repositioning as they tried to each get a good angle. Getting their fingers up each other's bums at the same time required some cooperation.
Their eyes met, shining with lust, fingers deep inside one another.
"Cel?"
"Hm?"
"I kinda want to kiss you."
Celeste bit her lip. "I bet you say that to all the girls knuckle-deep in your ass."
"All of them so far," Lucin agreed. "Can I?"
"You may."
They came together, lips connecting in a beautiful display of sibling horniness and love. They were helpless against their desires. Probably partly because of the lack of cumming.
They pulled each other closer, helped by their firm grips on each other's assholes. They moaned into each other's mouths as they got a little too close and Celeste's pussy made electric contact with Lucin's cock.
Almost immediately they detected the approach of their infuriating but very specific guardian.
--Do not do that--
The siblings whimpered as they pulled apart, but did so quickly enough to halt Matilda in the doorway. Matilda waited a moment, then turned and left again.
"God she's a pain in the butt," Lucin complained.
"And not the good kind," Celeste said, wiggling her fingers inside Lucin.
"Unf. Maybe it's good though. We shouldn't actually... do that."
"Do what?" Celeste asked innocently.
"You know."
"I do. I wanted to make you say it."
Lucin narrowed his eyes. "We shouldn't fuck."
Celeste burst into nervous laughter. "Oh god, you said it."
"I did." Lucin pushed his fingers deeper in Celeste's ass. "We shouldn't, you know."
"I know. We definitely shouldn't."
Again their eyes met with distinct, smouldering intent. They kissed each other and made out in increasingly sloppy fashion. They couldn't grind on each other, much to their mutual frustration, but continued to explore each other's asses quite freely.
"Ok, enough," Lucin panted. "To the restaurant?"
Celeste, on the verge of suggesting the same herself, quickly nodded. "Agreed. I need to cum."
"Alright, let's go."
****
Much to Lucin's confusion, Celeste pulled up and parked nowhere near to the restaurant he assumed they were going to.
"What, are we trying a new place?" he asked.
"Nope. Just making a stop," Celeste said with a teasing grin.
"Really? Now?"
"Best time for it. While we're horny."
"We're always horny."
"Not like this."
Lucin and Celeste exited the car.
"What are...." Lucin trailed off as he caught sight of a nearby building. "Oh, sex toy shop?"
Celeste nodded. "Sex toy shop."
"I... alright, I could be into this. You coulda just told me though."
"What fun would that have been?"
"You think it's too weird if I walk in there with a boner?"
"I think it's weirder that you walk in with your sister."
"Yeah, but no one will know about that."
Celeste laughed lightly and took Lucin's arm. "Just hide behind me if you can't keep you erection down."
"What exactly is it we're looking for?" Lucin asked, mind already whirling with possibilities.
"Dunno. Some butt toys, mainly. All my toys are for my pussy, which isn't helpful at the moment."
"... how many do you have, exactly?"
Celeste grinned. "I'll tell if you will."
"What?"
"How many you got?"
Lucin blushed faintly. "I asked first."
"True. I have...." Celeste paused and counted in her head. "Seven, I think. But I really don't ever use two or three of them."
"Really?"
"Yeah. You?"
"I... two."
"Just two?"
"Well yeah. It's not... it's not the same for boys, you know."
"Pff, a silly double standard. We'll fix that."
Their discussion continued in more hushed tones as they perused inside the shop. It wasn't a big enough store to really have a comfortable discussion."And you got no butt toys either, right?" Celeste asked.
"Of course not. Just... you know, those ones you masturbate with."
"Fake pussies?"
"... and a fake butthole."
"Ha!"
"Shush. Yours aren't any more dignified than mine, I bet."
"No, they aren't. Mostly vibrators."
"But not all?"
"I mean, two are just regular dildos."
"Oh right."
Celeste stopped short, and Lucin, not paying enough attention, bumped into her. They both experienced a small, shivering thrill as his poorly hidden erection collided with her butt.
"None of that now," Celeste hissed. "We're trying to be professional here."
"Wasn't on purpose."
"Sure it wasn't. What do you think, we each get a butt plug? Should be fine to wear those around the house."
Lucin considered the proposition. "Ok. And what about...."
"What?"
"I mean, this one says it vibrates."
"Interested, are we?"
Lucin squirmed, aware of his sister's teasing eyes, the woman over the cash occasionally flicking her gaze their way, and the one other customer he was aware of in the store, who hopefully wasn't paying them any attention.
"I mean, I've never had any vibrating toys," he said.
"True! You're right, let's get that. Ooh, and here's one over her, not a plug, but it's for vibrating bumholes."
"Er... how many things are we buying?"
"As much as are needed. I've got the credit card."
"Cel, Mom and Dad are gonna see where we spent money at, you know. We can't just go spending hundreds on sex toys."
Celeste frowned. "Do you want vibrating things up your ass or not?"
"... ok, fuck it, maybe they'll miss that line on the statement."
"That's the spirit. Now, for strapons, what kind of size do we think we want?"
"Oh god, you're gonna peg me?"
"Well yeah. Hopefully you'll peg me too, but I suppose we can burn that bridge as we get to it."
Lucin was increasingly insecure about the pile of toys Celeste was thrusting at him, but also horny enough and just barely trusting enough not to run away in terror and embarrassment.
Celeste was in a similar boat, even if teasing her brother helped her carry on like she wasn't slightly mortified of just how many items, clearly anal focused, they were accumulating.
"I still think the double dildo's unnecessary," Lucin murmured as they rang their purchases up.
"I think it's very necessary," Celeste said, though he face was as red as Lucin's by then. Especially with the woman at the counter trying to remain professional, but clearly amused by the two of them.
"When would we possibly use it?"
"We--"
The woman cleared her throat. "Sorry to intrude, just... would you like any lube with all of this?"
The sibs were silent for a moment.
"Uh... yes please," Lucin squeaked.
"Anything in particular."
"Do you, uh, have a recommendation?"
The woman nodded, smile still fighting for control of her lips. She grabbed a bottle, slipped it in one of their bags, and finished up the transaction.
"I can't believe we're walking out with multiple bags," Lucin growled as they retreated to the car.
"Well someone wanted all those vibrating things, didn't they?" Celeste growled right back.
"Well... yes. But I'm super embarrassed now."
"Yeah, me too!"
"... but it'll be fun when we get to play with them though."
"There is that."
They packed their stuff in the car.
"So, uh, to the restaurant?" Lucin asked.
Celeste nodded. "To the restaurant."
****
They had their restaurant game down to a science. Namely, sitting down, ordering immediately--food being a distant secondary concern--then entering one of the bathrooms together for naughty time. By the time they got back, their food and drinks were waiting for them, and sometimes even distinctly cooling on them already.
On this occasion, there was an extra step of actually smuggling a few toys to the bathroom with them while trying not to attract any more attention than usual.
"You figure after a while they'd have to clue in to what we're up to anyway," Celeste murmured just before they locked the bathroom door behind them.
"Hard to say," Lucin mused. "Not always same time of day or same staff present. And it's not like we do this all the time."
Celeste snorted. "It's pretty often."
"I don't know. No one's tried to kick us out yet, so that's good."
"Mmhm. Pants down, please."
Lucin nodded and stripped his bottoms off while Celeste pulled out a butt plug and once again examined the instructions associated. It was the vibrating one Lucin had insisted on, though he maintained it wasn't insisting so much as a passing interest. Either way, it was going up his bum. They'd charged it in the car on the way for that very reason.
"You know I should be able to control this with my phone?" Celeste said conversationally.
"Wait, really?"
"Yeah. I think... hang on, let me see if this works."
Lucin shifted impatiently. His cock was hard and pointed at Celeste, way too close to do her focus any good.
"Don't take too long," Lucin urged.
"Oh shush. Lube yourself up while you wait."
"... I wanted you to do that."
"Unf. Ok, well bend over and wait for me then."
Lucin impatiently bent over the sink and tried to be still, but kept fidgeting and looking back at Celeste.
Celeste, feeling like she might have things set up, lubed up her brother's butt for him before he got too antsy to stand still at all. They then struggled a little together to get the butt plug popped in nicely.
"Why's your butt so tight?" Celeste complained.
"Shush, you love my tight butt."
"True. It's just inconvenient for quick and dirty sexy fun."
"So sorry about that," Lucin said, not sounding sorry at all about it.
Once inserted, however, Celeste was delighted to find that she could, indeed, control it's vibrations with the merest swipe of her finger on her phone.
"Oh this is gonna be fuuunnn," she cooed.
Lucin whimpered as Celeste briefly took him to maximum vibration, then back down again. "Am I going to regret this?"
"Nope."
"Oh good."
Celeste left Lucin on a pattern of low to medium vibes, then pulled down her pants and presented herself for her own plug insertion. Just a regular, non-vibrating one in her case.
Lucin, horny as fuck already, and not helped any by the buzzing plug inside him, spread and licked Celeste's ass a bit before lubing her.
"Stick it in alreadyyy," Celeste whined.
"Jeez, impatient much?"
"I want it in my butt!"
Lucin smirked. "That's--"
"And then I want you to kiss my pussy while it's in."
Lucin's smirk quickly faded into a groan of sexual need. "Fuck, Cel. I can't very well say no to that."
"I would very much hope you couldn't."
Celeste meeped as her plug was inserted with a distinct lack of patience. Luckily it wasn't overly large, and in her horny state the momentary flash of anal discomfort only turned her on more.
She only had a bare few seconds to adjust before Lucin spun her around and pressed his lips to her pussy, just as she'd requested. She sighed happily and held his face to her snatch, encouraging more brotherly kisses.
Lucin continued to kiss her and start some small, tactical licks around her clit, while also pressing a finger to the base of her plug and wiggling it around some inside her. Her small moans and pants were a constant reward for making her feel good, as was the way her fingers ran through his hair.
"Mmm, suck on my clit more," Celeste purred. "And, mmph, keep playing with my pluuuggg."
Celeste whimpered and shook as she came. The plug up her bum created some new pleasurable connections inside her, sending little bolts through her in addition to the usual intense feelings of cumming. Her clit and ass felt like all one big, happy part of her, and she was briefly oblivious to the world as she shivered and moaned through her orgasm.
"You kinda like the butt plug, huh?" Lucin said while giving Celeste some cool down kisses on her pussy.
Celeste petted Lucin's head affectionately and struggled to form coherent thoughts. "I really do. It's like a whole new pleasure centre on top of everything else that I already liked."
Lucin nodded. "Makes sense. I feel like mine's gonna make me cum just from vibrating away in there."
"Really?"
"Well... not quite. But I need to cum badly though."
Celeste bit her lip thoughtfully. Even after massively cumming on her brother's face, she wasn't devoid of horny urges. "Where do you want to cum?"
"You mean where on you?"
"Of course."
"Hm. On your face is tempting, but--"
Celeste giggled. "We have to eat still without getting thrown out."
"I know, I was gonna say that. So maybe... on your pussy?"
"Unf. Oh you're bad."
"I'm aware." Lucin gave Celeste's pussy another kiss, then looked up at her with big, brotherly eyes. "Can I?"
Celeste patted his head some more. "Of course."
She pulled up her panties while Lucin stood up, then she made sure to dial up his butt plug's vibrations some until he was whimpering and pleading with his eyes.
"I'm gonna have a lot of fun with this," Celeste said gleefully.
"Cel, I need to cuuummm."
She grinned wider. "I know. Come here, let your sis take care of you."
Celeste pulled her panties away from her body to expose her pussy, then pulled Lucin closer with a tug on his addictively hard cock. He throbbed in her hand, making his need all the more evident.
She stroked him lovingly, and with a fair amount of excitement. She wanted to see him cum, just as always, but even more so with all that butt stimulation and the needful look on his face.
Lucin was putty in his sister's hands, totally under her control. He wasn't going to last long. Not at all. But that brief time before she made him cum was delicious agony.
His cum erupted forcefully, splashing hot on Celeste's skin. She gasped and pumped his cock harder, urging more and more gooey mess onto her pussy and into her panties.
Lucin had never had a cum like it before. He'd become quite enamoured with his sister's naughty touch, but this was more intense than that. The anal stimulation, that was it. It had felt nice, but while cumming was on a whole other level. Connecting zones within him that didn't usually communicate.
His orgasm lasted beyond emptying all his cum, still spasming and trying to shoot more into Celeste's panties, his body all confused and overloaded with happy feelings, but it did eventually subside. Celeste held him and patted his hair for a moment while he sorted himself out.
"Turn off the plug," Lucin croaked. "Please?"
Celeste nodded and tapped her phone. "How was it?"
"Kind of insane. I felt like I could have just kept going, like I needed to. It was so... urgent. But then of course I kind of ran out."
Celeste grinned. "We'll have to play more with that. See how long we can make you cum for."
"Oh god. What am I in for?"
"Only the finest in pleasurable experiences, I can assure you."
"Finest and most questionable?"
"Maybe."
Their food was well and truly cold by the time they straightened themselves out and returned to their table. That was fine, they didn't taste much anyway, eating mechanically, minds firmly elsewhere.
"The waitstaff here are gonna figure us out at this rate," Celeste remarked.
"If they haven't already."
Celeste shrugged. "Can't say as I particularly mind. Unless they ban us, of course."
"Yeah. Same."
Lucin got a few moments alone with his thoughts as he chewed some more of the food that he only barely registered. Then, with very little warning other than a smirk on Celeste's face that she just couldn't contain, he felt his ass start to vibrate again.
"Oh seriously?" he hissed.
"What's the mat-ter?" Celeste asked in a low sing-song voice.
"You know exactly what."
She tapped her phone. "Oh, you mean this."
The vibrations increased and started a repeated pattern of off and on.
"I'm going to regret some decisions, aren't I?" Lucin asked as what small attention he had for eating was replaced by leaning back in his seat and letting his lids fall half closed while trying not to moan out loud.
"Who are you kidding, dear brother? You don't regret any of this and we both know it."
"You're vibing my butt in public."
"Mmhm!"
"... and it's kinda nice."
"Thought it might be."
"I shoulda made you get one of these too. Play fair and all."
Celeste shrugged airily. "Oh well. Live and learn."
Lucin's eyes narrowed. "Just wait 'til we get home."
"Ooh, why?"
"Because we got lots of other toys today, and now you've got my imagination going."
Celeste bit her lip, tummy fluttering with nervous excitement. That look in her brother's eye was doing things to her. It was so... ferocious. Promising things that, in her mind, were both scary and thrilling.
And yet, despite her fears as to how far Lucin might go, Celeste couldn't help turning his plug up another notch. A small moan escaped his lips.
"What are you gonna do to me?" Celeste asked huskily.
Lucin grinned back evilly, despite the whirring in his bum and his best efforts not to give away to the whole restaurant what his sister was doing to him. "Nothing you don't want me to do," he said.
Celeste whimpered as though he'd offered exquisite torture instead of consenting sex. In an odd sort of way, he'd done both. "Should we just go?"
Lucin nodded eagerly. "I'll pay, you start the car."
****
The rest of the day was spent in the sort of activity Celeste had both feared and hoped for. Lucin almost immediately tied her up in his bed, and wouldn't answer where he'd gotten the rope from, nor how he knew how to bind her the way he did.
"I've watched porn," Lucin said casually, as though that explained it.
"What kind of porn?" Celeste asked, wiggling, against the ropes. "Straight up BDSM all day every day or what?"
Lucin could only sigh and admire the sight of his sister. She was face down, ass up on his bed, which was a delightful sight anyway. He'd removed her bottoms, of course, though he couldn't actually wipe the cummy mess off her pussy without alerting Matilda. That was fine, it was her bum he was after anyway. All her wiggling against her bonds only drew his attention more and more to his target.
"It's not like I'm suspending you or anything," he said, spreading Celeste's ass with his hands. "It's just basic tying up."
"Well it's... pretty fucking hot, actually."
"Oh really?"
"Yeah."
"It's working for me too."
"I bet." Celeste wiggled again. Lucin was spreading and staring at her butt, but wasn't doing much other than that. "You gonna eat my ass for me?" she suggested.
Lucin nodded absently. "Among other things."
He gave his sister a smooch right on her perfect little butthole, then gave her some nice, sloppy licks. He was so addicted to her ass, and there was nothing at all she could do to stop him enjoying himself just as much as he wanted. Not that would even if she could.
Celeste purred happily. She was all horny and wet from being naked and tied up anyway. Little had she known how much she was going to enjoy bondage with her brother. It was so sexy being restrained and helpless, and all the while knowing Lucin was going to work over her bumhole until she was a sopping mess.
"God you taste so good," Lucin mumbled around Celeste's butt. "Why do you taste so good?"
"'Cause you're a horny little thing?"
"Probably that, yeah."
"You'd have to be a horny little thing to tie your sis-ter up and eat out her butthole."
"That's quite a judgement coming from someone who jerked her brother off on her pussy earlier."
Celeste thrilled inside and tested her ropes again. Her pussy was flooded like crazy, and that was before the reminder that she still had Lucin's dried cum all over her snatch.
She was either going to have the world's best cum at the end of this, or be a horribly frustrated girl if she couldn't cum with no clit play. High risk, high reward.
Lucin played a lot more with Celeste's little bumhole. It loosened up for him the more he experimented, and the hornier she got. At first it was tight even for his finger or the butt plug she'd been wearing, but he was eventually able to easily get multiple fingers in, pop her plug in and out, and even graduate to one of her dildos.
"That was only supposed to be for my pussy, you know," Celeste said around a moan.
Lucin shrugged. "Can't put it in your pussy. So it's an anal dildo now. Not like you're gonna run out of toys."
"Just saying."
"I could grab that big double dildo instead, if you wanted."
Celeste whimpered. "No way, gotta work me up more to handle that. Plus it's for us to share."
"I don't know how you figure that. It's too big for either of us to handle."
"We'll get there. Lots of training to do."
"Anal training, huh?" Lucin said. "That's what you see for us?"
"... yeah. Don't you?"
"Maybe. Definitely maybe."
Celeste was definitely getting some of that training now as Lucin stuffed her ass with her dildo. It was quite a stretch at first, and continued to be a very tight and full feeling even after she'd adjusted some. When he moved the toy just right inside her, it produced some excellent sensations. Some of which felt very close to like he was playing with her pussy.
"Ooh, yeah, do it right there," Celeste moaned.
"You like that?"
"Mmhm."
Lucin was enjoying himself immensely too. It could be addictive putting things in his sister's bum like this. He kind of wanted to keep going, to see what she could take. He also, in a different way, really just wanted to put his cock in and feel her tight anal grip around him before cumming inside her and making quite a naughty mess.
He couldn't actually fuck Celeste's butt, thanks to their robotic chaperone, but he could keep playing to his heart's content.
Celeste got her butt stuffed until she was whimpering and desperate, and her pussy was soaking her thighs, running down them like a river. Lucin stuck a vibrator up there too, which buzzed away happily. He could stimulate her pussy through her ass, to an extent, but couldn't really hit her clit, which was all she needed to explode.
"Rub my clit," Celeste begged.
"I can't."
"Just for a second. It won't take long."
Lucin shrugged and kept vibing Celeste's ass while he reached around and found her clit.
--Do not do that--
"Goddamn, like she's always watching," Lucin grumbled.
Celeste's eyes rolled back. "Don't worry 'bout her. Jus' keep rubbing."
--Do not do that--
Celeste ignored Matilda and let the pleasure overwhelm her. That's all she'd needed was a few seconds of her brother fingering her clit to set her off, then she was lost in a world of anally cumming, a world she could easily become addicted to.
Lucin had to take his hand away from her clit as Matilda barged into the room. It was probably just as well they hadn't tried to fix the door, as it would have been busted down again without a second thought.
Matilda stopped, watching the sibs' anal play time impassively, then turned and marched out again.
"She really only cares about genitals," Lucin mused.
Celeste was mostly oblivious for a moment longer before slowly returning to the land of the conscious.
"Whatchoo say?" she asked dreamily.
"Nothing important. How was that?"
"Gooood. You should try it."
"Which part?"
"Aaalll of it."
Lucin untied Celeste, who in turn flopped bonelessly on the bed, then purred like a cat as she stretched out and got comfy.
Celeste looked up at her brother, giving him big, adoring eyes, and reached her arms out toward him.
Lucin slipped into Celeste's cuddle, the two of them eagerly holding each other all snug and warm. His cock semi-accidentally pressed against Celeste's pussy for a moment before they heard a robotic warning and had to adjust themselves different.