You wound up staying over at Rosie's home for longer than you'd initially planned, mostly at Lily's insistence. After some discussion, you finally decided to tell her that you and Lily have made a major step in your relationship. You're seated on the couch, Lily in your lap, Rosie sitting on the couch off to your side as your hard cock rubs at Lily's lovely rump. "Rosie," you say, with a glance at her, when the commercial break comes on the show the three of you were watching. "How do you feel about grandchildren?"
She lets out a small laugh. "I miss when Lily was young," she tells you, with an honest look in her eyes. "I just love little kids, and I'm sure you two will make great parents, when you finally make that plunge." Something must show on Lily's face, because Rosie's expression shifts, quirking a bit. "You didn't... already? You're so young."
"Mac is making a lot of money, with this online job he has," Lily explains, quickly. "We can totally do it, don't worry, Mom," she explains.
There's a moment's hesitation, then Rosie leans over, wrapping the two of you in a big hug. Lily lets out a small squeak of surprise. "I'm so happy for the two of you. Being a mother... it's one of the greatest gifts that we've been provided on this world," she explains, pecking Lily's cheek, then yours. "I do wish I could be a mother again..." She sighs.
Lily glances over her shoulder at you, and you look back at her, the pair of you silently communicating for several seconds as Rosie just snuggles against you. Eventually, Lily nods, jerks her head to Rosie, and nods again. She mouths the words, 'Tell her.'
"If you'd like," you tell Rosie, "I could make that wish come true."
Rosie pulls back, cheeks warm. There's only a moment's hesitation - glancing briefly at her daughter for confirmation - before she nods quickly, as if afraid you'll change your mind. "That, yes, please," she says, her mouth nervously twitching at the idea.
You gently lift Lily out of your lap, then simply heft Rosie up, carrying her bridal style to her bedroom. She's wearing another one of her insanely sexy sweater-dresses, her thighs revealed with just how short it is, and you quietly push it up, Lily getting up behind you to watch as you tease her mother's bare thighs and stomach. "Thank you, for, a-ah, breeding me," Rosie tells you, her cheeks flush as you tease the bare skin for several seconds. "Don't worry, Lily, I'm not going to try to steal your boyfriend away from you, or anything like that. I love you so much," she breathes out, the words coming out like the most saccharine admission a mother could give her daughter, despite the situation.
When your fingers start to unzip your pants, her eyes are instantly drawn away from her daughter to the bulge, her breath quickening as she stares lewdly down at your manhood. Her lips part and she simply stares at your cock, her brain seeming to turn off for several seconds. You waggle your dick back and forth, and she just blankly stares at it. "You need to build up resistance to it, Ms. Dundel," you tell her, and she just blankly nods, not even really processing your words. "Lily doesn't have her brain completely turn off from seeing my cock like this..." you tell her, chidingly. Again, she nods, and again, you don't think she has the foggiest what you just said.
Lily's the one who starts to peel down her mother's panties, revealing her pink sex, already drenched in juices from watching your dick. She doesn't pay the least mind as her daughter prepares her for your cock. "I'm so lucky that you and my mom get along so well," Lily says, in this deliciously erotic tone of voice that somehow makes the statement sound both innocent and lewd. "So many guys have problems with their mother in laws, after all. You'll baby sit, right, mom?"
Rosie just nods, her eyes completely fixed on your hard cock as it starts to gently saw at her slit, teasing it with the underside of your massive girth. She spreads her legs wider in anticipation.
You let your hands grip Rosie's bare stomach, her sweater dress gently tucked in on itself just over her belly button, and you start to push your cock slowly inside her. Her tight sex quivers momentarily on your dick as your cockhead starts to force its way in, and you're barely two inches in when she comes, hard, squealing in pleasure, her hips jerking and bucking, some saliva rolling out of her mouth as she continues to take your cock. You let yourself come to a halt, your future mother-in-law's wet sex giving the tip of your dick a delicious little massage, rolling up and down it, her head casting from side to side, vivid red hair framing her beautiful features.
Lily is by now pressed up behind you, full breasts pushing against your backside, her chin tucked onto your shoulder as she watches you fuck her mother. "I always wanted a little sister," she says, in a soft voice, "but I didn't think that getting one would be so sexy," she adds, with a soft little giggle, almost nervous.
You let one hand leave Rosie's hips as her mother stops convulsing beneath you, instead finding Lily's hand, twining your fingers together with hers. You give her a quick smile, then slam your cock as hard as you can deep inside Rosie's waiting sex, kissing at her deepest parts immediately. Her hips buck wildly, her eyes rolling up in pleasure as your massive, thick rod plays with the entrance to her womb. "Mac's cock is so great, right, Mom?" Lily asks, sounding almost breathless, and all Rosie can do is dumbly nod, her whole body shivering in pleasure as she does so. "Well, if you're going to have his baby, you should have sex with him when I'm not available, right?" She suggests, squeezing your own hand back as she does so.
"Muh, nyuh," Rosie sputters, trying her best to respond, but by the way she rapidly nods, sweat already making her hair stick to her skin here and there, you're pretty sure that's meant to be a yes. You just enjoy the feeling of Rosie's wet sex squeezing and wrapping around your cock, her juices seeming to drip all over your length as she accepts your girth.
"Right," Lily says, licking her lips. "You know, you should move in with us soon," she explains. "Or maybe we can move in with you. Being all alone, I don't think that's right for the mother of my future husband's children, do you?" Another ridiculous, slurred out 'yes' and rapid nod, and you finally begin to gently pull out of her wet, tight cunt, her eyelashes rapidly fluttering as your length rubs against every groove within her sex. "Right. You'll live with us, and you can help keep our home clean, too. Since I'll be going to classes even after my baby, but you're retired, you can just stay at home and watch both our children, right?"
There's a heat to Lily's cheeks, and she gently grinds against your backside as her mother wildly nods in response. "Rosie," you say, holding her in place as your cock saws a couple inches back and forth. "You like my cock, don't you?" You're curious how verbal she can get right now, and Rosie just dumbly nods, rolling her head around as if trying to get a good perspective on why you're not fucking her. "So you should tell me just how much you love my cock," you explain. "After all, it's the cock that's going to give you a second child. You should tell it thank you."
"Thansh," she slurs out. "Thansh, mishur cock," she squeaks, and you start to push into her again, making her quietly shudder, legs kicking at the air a bit as you bury yourself to the base within her. "I luff how big you are, mishur cock," she slurs, doing her best to obey your earlier directive, and your cock twitches inside her waiting sex, the pussy that your girlfriend came out of, the pussy that your second child is going to come out of.
Lily speaks up, then. "Are you addicted to Mac's big cock?" Rosie nods as best she can, otherwise simply limp and pliant beneath you. "Do you love his big cock? Does your heart belong to his big cock? Could you ever enjoy a normal sized cock again?" Rosie gives the appropriate replies to each question, nodding and shaking her head in turn, her cunt squeezing on your dick as another orgasm soon rushes through her.
That's how things go on, with you and Lily's mother. Both you and Lily keep pushing, subtly and gently, enjoying the way that, in her current senseless state, Rosie will nod and agree with anything you state. You get silly at one point, asking her if she'll be your live-in sexual relief maid, or if she'd rather be your personal cockgoblin, or if she thinks she was born to be your human onahole. Any question of that kind gets a nod, and if you press, asking if that contradicts her earlier answers, she just goes cross-eyed, and you generally put her out of her misery by kissing her womb with your dick again, making her twitch and jerk as a fresh orgasm rushes through her.
You come a couple times yourself, Rosie orgasming in sympathetic ecstasy, her tight pussy working overtime to drag out an orgasm from you, saliva rushing down her cheeks. By the time you're finished, she's a ridiculous mess on the bed, her sweater caked in sweat, her pussy leaking a thick load of your cum. Lily is grinding against your backside in arousal at watching you so utterly dominate and breed her mother.
"Rosie," you say, making the woman half-stir. "I'm going to fuck your daughter now, so you need to make sure my cum stays inside you. Can you do that for me?" Numbly, Rosie's hands reach for her thighs, and eventually she hefts them up, twisting herself into a pretzel, her pussy elevated, cum trickling downward towards her womb in the process. You smile at her, and grab Lily, pulling her around to stand in front of you. She blushes a bit as you grab the base of her blouse, yanking it up and over her head, revealing her bare breasts. "No bra?" You tease, before kissing her harshly on the lips, making her moan, your hands groping and squeezing the soft flesh, teasing the nipples between your index and middle fingers as you do so. You strip her the rest of the way during your long makeout, and she orgasms just from your tongue against hers, her nipples against your chest.
Then you simply twist Lily around, so she's on her hands and knees above her mother, her wet sex presented to you for your use, and start to rub your cock against it. Lily's bright red as you prepare to fuck her literally right on top of her mother, but she doesn't object, and neither does Rosie.
You grip Lily by the hips and simply force your cock inside her cunt, which by now is perfectly sculpted to accept your length, beautifully rubbing at every inch, groove, and vein, sweetly wrapping around the ridge as you bottom out, thrumming up along the underside as she quivers gently. A soft pant escapes her throat, and a dollop of her saliva splashes down onto her own mother's face, earning no more than a faint pant from the Dundel matriarch.
You hold yourself inside Lily for a long moment, simply drinking in the sight - Rosie half-naked, Lily entirely nude, your cock throbbing inside your beloved girlfriend as her mother has herself still twisted up like a pretzel, legs now resting against Lily's shoulders, nipples gently rubbing against one another's tits. "Take off her top, Lily," you groan, wanting to see both their naked bodies, the naked bodies of your future wife and future mother in law, pressed up against one another. Lily quickly accedes to the command, pulling her mom's top off, and you press down on her with one hand, pushing her tits up against her mother's, her clit rubbing against her mom's.
"Ah, you're both so beautiful," you groan, your dick twitching inside Lily. "I love your red hair," you add, reaching for Lily's own, grasping it, using it as handlebars to twist Lily's head to the side so you can kiss her. You're sloppy with your kiss, intentionally so, practically working to make sure that saliva drips out from the space between your two mouths. It splatters onto Rosie's cheek, your cock twitching inside Lily as you enjoy her body like that, starting to gently thrust, a gushing torrent of her juices pouring down on her mother the moment that the tight plug of your cock is disrupted even a little, her cinnamon scent wafting up through the room, sweet as she is.
All Rosie can do is softly mumble, quivering a bit as her daughter's body is rubbed up against her. The incestuous lewdness of the entire situation is driving you wild, and by the way that both women are responding, you'd say they're certainly enjoying themselves too. Having a situation like this really happen, it's an impossible dream - your girlfriend and porn camerawoman, and her mother, both letting you breed them, enjoy their bodies, fuck them silly. You feel like a sexual god, like Lily and Rosie are both your women, and your cock twitches needily inside of Lily's waiting cunt before just immediately unloading, the woman you love driving you absolutely crazy inside her.
Of course, once simple orgasm isn't enough to stop you from fucking Lily, so you start to pump her again, the wet noises of your own cum getting sloshed around in her tight pussy coming out thick and lewd in the room, some of it sloshing out and splattering her own mother's pussy. You finally break off the kiss, then, staring down at Rosie, who by now has gotten quite a bit of saliva smeared across her face, her eyelashes fluttering a bit. Her hands even come up to her daughter's belly, rubbing at it, gently teasing at your cock through the flesh. A smile is on her mess of a face, as she stares up at Lily, who's simply jerking and spasming on your cock in pleasure.
"I'm so happy for you," Rosie says. "This will be fun, don't you think, Lily?" All Lily can get out is a faint gurgle, incoherent and nonsensical, her earlier teasing now turned back around on her. "We'll both be pregnant at the same time, and from the same man. It'll be the ultimate mother-daughter bonding experience, don't you agree?"
All Lily can do is sputter and twitch as she comes on your cock again, eyes rolling up, more of her saliva dripping down onto her mother, and Rosie pants as well - Lily's body is rubbing hers quite thoroughly, hard nipples scraping against the very same soft bosom which once nursed her, her clit grinding against the very same pussy which once birthed her.
"With two wonderful, sexy women like you, I'm sure that all our children will be healthy and incredibly attractive," you tell them both, bottoming out in Lily and unloading once more, your hot load of seed cutting off whatever Lily was about to say as she just moans in raw pleasure, her brain temporarily shutting off. Rosie simply softly runs her fingers through her daughter's hair, a loving, sweet look on her face that's completely inappropriate for her current situation.
It just makes you go a little crazier inside Lily, wet squelches coming out of her pussy as you fuck her silly like that, the pairs' bodies serving as excellent contrasts to one another, cum gently leaking out of Lily's cunt and into her mother's in a pattern that is driving you a bit crazy. When Lily finally manages to speak, it's in a slurred tone of voice. "All our sons, will have, big cocks," she sputters, "and our daughters, big tits! Like you and me! I love you, Mac!"
Those words make you unload inside Lily for the third time, groaning as you bottom out, doing your best to give your firstborn a twin, despite the impossibility of that. Her hot gasps, her saliva splashing down, and her head finally coming to rest atop her mother's, the two bodies lewdly bound together... it makes your dick throb even as you pull out of Lily and just admire the view, the two Dundel women tied together with your cum, which forms a gentle river out of Lily's cunt and into her mother's, binding the two together.
You gently lie down on the bed, hefting the pair up to either side of you, a soft trail of your semen leaking out of both girls, combining with their juices to create a thick but lovely stench as they're pulled against you. Soft, full breasts pressing against either side of your chest, Lily's gentle smile as she nuzzles against you, her eyes fluttering and then simply closing as she listens to your heartbeat, still pounding hard in your chest.
"Rosie," you say, attracting the attention of your future mother in law, who looks up at you expectantly. "You're going to move in with us, after the baby's born," you tell her, seriously. "I want you to spend time with your granddaughter, and I want to see my daughter every day," you explain.
She blushes, biting her lower lip, but smiles and nods. "Ah... I think I might be falling in love with your boyfriend, Lily," she says, nervously, cuddling in tighter against you, listening to your heartbeat.
"I'm happy to share him with you, Mom," Lily says, which makes your naked cock twitch.