Chereads / Taboo Incest sex stories / Chapter 834 - KEIRA'S NIGHTIE

Chapter 834 - KEIRA'S NIGHTIE

I have always been fond of my step-sister Keira. For the seven years her mum and my dad have been together, she's never been any trouble. Growing up she was always a sweet kid, kind of quiet; accepting of my dad into her life, the same way I accepted her mum into my life. We made a neat little family unit after my mum ran off to Barbados with some shredded Australian guy.

Keira is eighteen years old now, and she's changed a lot from the sweet kid I once knew. She's still pretty petite at 5'4", with lovely brunette hair that has a healthy sheen to it that shimmers in the light. Slim and dainty, she always seems to have a cute smile on her face, and is always set to start giggling at the slightest joke or funny happening. She has perfected her makeup skills over her teen years too, to the point where she started her own little side business doing her friends' and families makeup.

I usually see her around the house after I'm home from work; she goes to college three days a week on a hair and beauty course. My time is taken up with my full-time job at a call-centre, which is dull as all hell, but pays well enough that I can contribute around the house whilst saving up for my own mortgage. At twenty-two I think that's a pretty responsible goal.

Often if I catch a glimpse of Keira in her yoga pants, or coming out of the shower in her towel, wet brunette hair falling in gorgeous curls around her slim shoulders, I can't help but notice how great her figure is. She has danced competitively and as a hobby for five years now and it has given her bum a perfectly toned peach shape, as well as firming her thighs and calves... Not that I look for more than a few seconds.

I'm something of a loner, I don't hang out or go to clubs or anything, so when Keira started to ask where the best spots in town were, I said I would ask the guys at work. When I asked, they smirked at me.

"Why you asking foo'? You don't go out." Said Treyvon. Trey is two years younger than me, a black guy who is a hell of a brown noser, often agreeing with what my boss Lamar says and giving me a hard time.

"My step-sister Keira wants to know. She turned eighteen recently." I explained.

"Sheeit, she hot?" Lamar grinned, overhearing the conversation. Lamar is a few inches taller than me at 6'1" and jacked as hell, often coming into the office in cargo shorts that show an impressive bulge that nobody dare question him on.

"Umm..." I got tongue tied hard. The two pulled her up on Facebook quickly. I know they would see the profile pic of Keira and her best friend Maisie, who was also a smoking hot petite brunette, posing in their workout gear against a mirror.

"Sheit son! She is fiiine. Friend request sent!" Said Treyvon, smirking at me.

"Same, playa!" Lamar laughed and hi-fived.

My cheeks turned red and I tried to ignore them, burying my shame in work.

That evening, Keira came home from her dance class a little sweaty and red around the cheeks. She had her tight black leggings on with a flowery tube top, showing her perfectly smooth stomach. Despite her slimness she has some width of bone at the hips, giving her an hourglass figure sculpted through hours of excercise and healthy eating. I could smell the faint aroma of her flowery deodorant underneath her musky feminine sweat, which even has a sweet tang to it itself, as she approached me with her phone. She held it out and leaned forward, making her B-cup tits press together.

"Do you know these guys?" She asked quizzically, her pink headband contrasting with her gorgeous, deeply dark, hazel eyes. I looked at the phone and saw Lamar and Treyvon on the friend request section. Both of them had obnoxious profile pictures, Lamar shirtless in the mirror, Treyvon with a bottle of Grey Goose in a luxurious club.

"Uhh, y-yeah, they're guys at work..." I stuttered, trying to hide the tent rapidly being pitched in my trousers at the intoxicating scent of her post-workout dampness. There was a perfect teardrop gap between her thighs despite her standing with her dainty size 4 feet together.

"One of them, Treyvon, messaged me... They said you spoke about me at work, and told them I was hot?" She tilted her head and raised one eyebrow.

"W-what!" I exclaimed. "That's stupid! I hate those guys... Well... Why I oughta..." I babbled, flustered. She giggled, and put one hand on her hip in a sassy stance.

"So you don't think I'm hot then?" She teased, sweetly.

"Wha- I'm your step-brother!" I objected, mortified. My tent was well and truly pitched though, even with the minimal makeup she had on and her red post-workout glow of heat on her teasing face she was heart-achingly beautiful.

"Well... As long as you're sure." She said, then slowly leaned forward. I froze. She pursed her soft pink lips...

I leaned in...

Felt the heat of her body warming close to mine...

Then she moved to the side and pecked my cheek.

Giggling, she winked at me, then picked up her bag and went upstairs. I wrenched my eyes away from the mesmerising sway of her perfect ass and shook myself, blinking a few times, then tried to ignore my straining boner while I finished my microwave lasagne.

Now it's a couple of days later, a Friday, and I have kind of avoided seeing Keira around the house. It's just awkward. I check my phone calendar and see that I booked today off to give myself a three-day weekend. Score one for the boys back home!

But wait - Keira doesn't go to college on a Friday. Which means we may run into each other. Which means awkwardness. I groan and check the time. 9am. Step-mum and Dad will both be at work. I lay in bed and struggle with the classic male morning dilemma of needing to pee and simultaneously having a rod of steel due to morning wood. I get out of bed and tense my calves a few times, redirecting the blood flow down my legs and away from my dick. Getting it to semi is good enough and I throw on my dressing gown and stick my head out of my door to scan the landing.

To the immediate right of my room is the bathroom at the end of the hall, which is a blessing for me as it effectively acts as an ensuite. Across from me is step-mum and dad's room, the largest bedroom; then to the left of my room are the stairs. Past the stairs at the other end of the corridor is Keira's room.

I notice her door is closed and tiptoe to the bathroom, relieving myself with a deep relaxing "Ahhhhh." as I do. I always like to relax into a pee. I wipe the tip, flush and wash my hands, drying them on a fluffy white handtowel. Satisfied, I open the bathroom door.

Immediately I see that across from me Keira's door is ajar. There's a little glimpse of her pink flowery wallpaper just beyond it. I frown, knowing it was definitely closed when I left my room. I feel like I can hear muffled sounds, something that sounds like... An electric toothbrush? Is she brushing her teeth in her room?

Curious, I close my door audibly, to make her think I have gone back to bed. Then I tread carefully across the beige carpeted landing, avoiding the creaky floorboard at the top of the stairs. The buzzing sound hasn't stopped, and gets louder as I get nearer. I listen intently as I pass the stairs.

"Oh my god..." I hear Keira whisper softly. The buzzing goes moves as if a housefly is darting up and down rapidly - and then a low moan from Keira makes realisation dawn on me.

"Mmmm..." I hear her getting more vocal. It's definitely a vibrator. I am right outside her door now. I know when entering Keira's room that her double bed is immediately to the left, across from a TV balanced on a chest of drawers and a wardrobe with a full length mirror on one door. If I angle my head just past the door, I'll be able to see the mirror reflecting the bed.

Now I can hear telltale wet, slopping sounds as the vibrator is moving against her, and I visualise her sweet pussy. I feel the surge of intense arousal. Forget calf tensing, my tent is pitched seemingly for good.

"Ohh yes..." She sighs, I hear her rustling against the bedsheets, she must be moving her hips, wetly grinding her pussy against the vibrator slick with her teenage juices. I decide I must at least take a peek.

I edge towards the door decorated with a red heart and a bright yellow sign that says "Future Dance Star!" that she has had on there since age fourteen. Slowly I lean forward, extending my head just past the edge of the door...

The sight almost causes me to cum in my pants on the spot.

In the reflection of the mirror I see Keira is on the bed in nothing but a strappy pink flowery nightie that accentuates her sensuous tanned skin. The white cotton panties she must have slept in are discarded on the floor near the door. Her legs are spread, her back is arched and in her right hand she has a plastic, black, three-inch bullet vibrator she is rubbing over her clit. She is clearly riding waves of pleasure nearing orgasm, her other hand has pulled her perky tits out of her nightie and she rubs both pink nipples as much as she can in rhythm with the movement of her hips against the vibrator. Rubbing the toy in a circle around her clit, then dipping it between her wet pussy lips and into her hole, pushing it in and out and bringing it back up to her clit again; she moans in pleasure as my jaw is agape and my cock is rock hard.

"Mmm fuck!" Her hips buck once, twice, her legs shoot out straight and she makes a low "Ahhh" sound as she cums, holding the vibrator on the outside of her sensitive pussy lips so as to not overload herself, she savours the orgasm as the pleasurable waves cause her legs to shake. I realise soon she will come out of her masturbation trance and will likely look around, so in the moment I make a reckless, horny decision.

I crouch low, and lean further forward, reaching out my arm - and grab her soft white cotton panties from the floor.

Hearing nothing but my step-sisters heavy post-orgasm breathing and the fading buzz of the vibrator, I turn and creep quietly back into my room, opening and closing the door as softly as I can. Like a man possessed, I jump back into bed and examine my prize.

They aren't the kind one would wear to a club, or out on the town, but Keira's scent emanating from the delicate white material is already mesmerising me I pull my solid cock out and start jacking it, opening them up to look within.

In the undercarriage, the part coming into direct contact with her young pussy, is a soft patch of sticky dampness - I realise Keira must have been wearing these before she started playing with herself, and the wetness is from her sumptuous pussy juices. I hold them to my face and take a deep whiff, the intoxicating smell causing me involuntarily to make a low moan and starting beating harder, already knowing I'm going to cum soon.

A half-thought of guilt flashes through me as I get my next depraved idea - but I am too horny to stop myself. I lick her pussy juices from her panties, the musky taste somehow sweet and salty on my tongue, the depravity of the act increasing my arousal. Fuck, I'm going to cum!

Gripped by one last act of frenzied horniness, and without anywhere else to shoot my load, I hold the panties over my cock and pump ropes of jizz into the undercarriage, the stickiness from her pussy kissing my cockhead as our sexual juices mingle. My climax is so intense and gripping I let out another moan and shudder, lying there with my chest heaving.

As my arousal dies down, post-nut clarity sets in, and I feel anxiety sit heavy in my stomach. I just came in my step-sister's panties. Fuck. I just stole my step-sister's panties - and now I can't even return them - double fuck.

Then I hear the creak of the floorboard at the top of the stairs, and dainty Keira whistling a sunny tune in the hallway. I freeze as I hear footsteps outside my door. She lingers there for a second...

Then walks straight by into the bathroom. I breathe a small sigh of relief as I hear the shower start running, and with rising panic look down at her panties covered in my jizz.

How the hell am I going to explain this?Perched on the edge of my bed, Keira's cumstained cotton panties in my hand, my heart pounds. I cannot possibly return them in this state, the stain is so glaringly obvious - and I certainly cannot keep them! If my step-mother, Nicole, comes in to tidy my room and finds them, I would be ostracised as some panty-sniffing, incestuous pervert by the whole family!

The only solution is to dispose of them. If Keira asks me about it, I'll deny all knowledge and say she must have misplaced them or something. I hear her now, in the shower, singing a slightly out-of-tune version of Lady Gaga's "Poker Face". Despite her having many talents, I must admit singing is not amongst them.

Without stopping to ruminate too long on whether or not my plan of outright denial constitutes gaslighting, I jump out of bed and throw on some socks, grey tracksuit bottoms, and a black t-shirt. I throw my comfy grey zip-up hoody on too and ball up the panties with the damp side facing inward before stuffing them in the right hoody pocket.

I slip out whilst Keira is still showering, figuring if I can get to the bin in the kitchen then I can shove the panties down underneath last night's dinner scraps and crisp packets, before taking it out and emptying it in the dustbin outside, never to be seen again. The floorboard creaks as I come to the top of the landing and head down, somewhat calmed now that I have a plan, but with my blood running hot knowing I still have to carry it out.

As I tread carefully down our beige carpeted stairs I lean for a listen over the white wooden bannister down into the hallway below. Can't seem to hear anything in the house but the running water from the shower and Keira's singing - lucky break. Our last three steps turn right at the bottom and open onto the hallway that ends at the front door to my immediate left, or I can continue straight on to the living room or take a right to the end of the hallway into the kitchen.

After sticking my head around the living room door, seeing our two brown leather double-seater sofas vacant and TV turned off, I turn right and head toward the kitchen. Just as I am about to enter I freeze as I hear the front door behind me unlock and swing open with a cold rush of air.

"Oh, hey James!" I hear Nicole's voice behind me, breathless. "I didn't know you were off work today." She says as she closes the door behind her.

I turn and see my step-mother, brunette hair like Keira's up in a bun, in her pink fluorescent running gear. She has the whole kit, fluffy headband and sweatbands, black thermals beneath for running in the cold Winter weather.

"Uhh, hey, Nicole." I stammer. "You... Been for a run?" I cringe at the awkwardness of the question.

"Yeah... How'd you guess?" She laughs it off, showcasing a horseshoe of pearly white teeth between her full red lips, and kicks off her running shoes on our brown 'welcome' mat. "I tell you, it's getting real cold out there now. I might have to borrow your hoody for my next run!"

I try to avoid actively gulping at the thought and attempt a cool chuckle that comes out as a too-loud laugh.

"Oh boy, it uh... It sure is cold." I try a nonchalant lean against the hallway wall and stuff my hands deep in my hoody pockets to avoid her noticing the bulge of the panties. I'm so nervous it's a wonder I don't have a single cartoonish bead of sweat rolling down my forehead.

"Well it's warm at the shopping centre, and I booked today off so that me and Keira could do some Christmas shopping. You can come too, if you like?" She smiles at me, looking at me with her big dark hazel eyes, reminding me of Keira's, whilst she takes off her sweatbands.

Undeniably, Keira is hot, and hot in a gorgeous and freshly youthful way. However, it is painstakingly clear where she got her good looks from; her mother is like a mature, slightly taller, thirty-eight year-old version of her. She has a great, healthy complexion, having an interest in fitness and health that she was sure to impart onto her daughter along with her rich brunette locks. Her soft skin is usually kept browned from the sunbeds the two enjoy visiting together.

The similarities in their faces do not extend to the chest area, however - where Keira has her cute teenage B-cup titties, Nicole has heavy DD's. She usually jokes that they filled up in pregnancy and Keira never drank enough as a baby to deflate them. The case is the same around her ass and hips, retaining a little baby weight on her slim frame. Right now I feel somehow grateful that I recently nutted so that the cleavage caused by her sports bra and tight fitness wear isn't completely capturing my gaze.

"Shopping... Yeah, shopping sounds cool!"

Just say words to get her out of the way. I can think about what they mean later.

"Great!" Nicole smiles warmly. The sound of Keira's voice calling from the top of the stairs nearly makes me jump out of my skin.

"Mum! You back?"

"Yeah, honey! James is coming shopping with us, will you be ready soon?" Nicole calls back. I feel a dread hand grip my stomach as I hear a creak and Keira descending a couple of steps so she can pop her pretty face over the banister in her bathrobe, hair wrapped up in a light blue towel.

"You're coming for a girls day out, huh?" She teases, my cheeks reddening. If only they fucking knew what was in my pocket. Nicole giggles.

"Don't torment him, Keira!" Nicole comes over and pats my arm, which unbeknownst to her is attached to a hand which is currently in direct contact with her daughter's worn panties, which I have soaked with my cum. How has it come to this? In the cold light of day this looks really bad.

"Yeah, I'll come, uh... I just need some breakfast and stuff." My eyes are literally darting from one to the other now, hoping the dark-eyed and dark-haired gorgeous mother and daughter pair won't question my obvious weirdness. Nicole's proximity allows me to smell that same post-workout sheen of dampness that I smelled when Keira was close to me after her dance lesson a few days ago, and it causes a shameful flutter in my cock.

"Cool! Me too, will you make me some toast, James?" Keira asks, using a silver-sparkling fingernail to dig some water out of her ear.

"Keira! Take your finger out of your ear, it's not ladylike - and make your own toast. James isn't your slave." With that, Nicole winks at me as Keira rolls her hazel eyes and descends the stairs in her white bathrobe.

"I'll jump in the shower and we can leave in thirty minutes guys, sound good?"

"Yes, mother."

"Yeah, that's cool."

I wonder if I will ever be rid of this shameful mistake.

__________________________________

In the back of the car, hands still firmly lodged in my pockets, I mentally squirm and fidget around plans that will enable me to get out of sight of the two. I settle on the men's bathroom. I reason this works out even better, I'll just throw the panties in the toilet with no chance of them being traced back to me.

In the front, Nicole and Keira are singing along to Katy Perry's "Teenage Dream", both in the same obliviously off-key way. I allowed Keira to call shotgun so that I didn't have to sit in the front with my hands too obviously glued inside my pockets the whole way.

With my new plan solidified, I relax a little. Feeling the warm air from the car heater blowing pleasantly back at me, I take my hoody off and roll it up tightly, placing it next to me on the middle seat.

"Just have to stop for some petrol." Nicole says as she pulls in beside a Jet petrol station pump and the faint but oddly comforting smell of petrol fumes wafts into the car. She switches the engine off and goes outside to fill up, leaving me and Keira inside, me sitting behind the driver's seat. She puts her chair back a little and puts her size 4 sneakers up on the dashboard, reclining. Her stylish, black, ripped jeans show flashes of her smoothed tanned thighs and I wrench my gaze away as images come back into my head of seeing those gorgeous thighs spread in the mirror as the vibrator slipped between those perfect pink pussy lips as wet as morning dew. The image seems to have been seared into my brain forever, as well as those panting moans, and I can't believe it is the same teenager who hums innocently in the front seat now. In the rear-view mirror I glimpse her brow furrowing.

"James?" She asks inquisitively in her lilting voice.

"What's up?"

"What time did you get up this morning?"

I freeze. She's still looking down at her phone nonchalantly, from here if I don't look in the rear-view I just see her soft dark pony-tailed hair tumbling down over her thick blue Winter jumper.

"Uhh... When you got in the shower, it woke me up." I say slowly, trying to invent the path of my lie as I walk along it without tripping myself up.

"Oh. I didn't hear you get up, that's all." She goes back to texting on her phone.

I exhale in quiet relief. Keira shivers a little in her seat as Nicole forgot to leave us the heat on. Looking out the window I smile at her as she gives me a thumbs-up that the tank is full and heads inside to pay. Keira shivers again.

"Man, it's cold! She could have left us the heat on, at least." She turns in her seat, frowning, and spies my hoody. "I'm stealing that!"

My eyes widen.

"No!"

I'm a half second too late. Her hand darts out and grabs it and she throws it around her shoulders whilst sticking her tongue out like a teasing brat.

"You're a big strong guy, you can handle the cold!" She teases.

"K-Keira! No! I'm fucking cold too!" I shout, panicked, attempting to flail forwards but being restrained by my seatbelt locking.

"Well there's no need to swear." She giggles. My heart catches in my throat and the sparkly-silver nails of her hand glint in the cold daylight as she brushes over the fabric bulge in the right hoody pocket.

"What's this?" She looks puzzled. I am helplessly frozen in place, leaning forward against my seatbelt, mouth hanging open in a wordless preemptive attempt at an explanation that my hopeless brain can't even muster the words for.

Her hand emerges from the pocket in slow motion; a trail of scraggly white cotton material follows between her dainty thumb-and-forefinger grip. She frowns deeply, even more confused, then unfolds the creased material, her mouth opening in an OMG expression as she realises the partly crusty, partly still-damp item of clothing she holds in her hands is her own stolen and cumstained panties. The aired panties hum with the smell of my stale cum.

Time stands still for a solid minute. Mortified, I can only wonder if there is a selection of words in existence in the English language that I can arrange in the correct order to set this right. My attempts to will them into existence all fail. Keira is the one to break the silence.

"Wondered where I put these..." she whispers softly.

Her small, beautiful face looks at me over my shameful, horny mistake. She speaks again, more sternly. "You've got some explaining to do, James."

"Please, Keira, I will explain. I swear I will. Just don't tell Nicole. Please!" I beg. Keira raises an eyebrow. "I don't want everyone to think I'm some sex-crazed pervert." I say sadly, eyes brimming and watery. Keira smirks at me, a mischievous flash in her eyes.

"Only a sex-crazed pervert would do this though, wouldn't they? Jack off in their own step-sister's underwear?" She torments me with confidence now.

"Please, Keira. I swear it won't happen again." In the corner of my eye I catch Nicole emerge from the shop and head back towards the car, having grabbed a couple of drinks for us while she was in there. Keira follows my gaze and smirks evilly at me again, then turns and reaches down into the footwell of the car and pushes the balled-up panties deep into her handbag.

A cold waft as Nicole opens the driver's-side door breaks the paralysis spell and I sink slowly into the backseat after the most tense moment of my life. My cheeks are still burning red.

"Aw, it was nice of you to lend Keira your hoody." She stops for a minute and sniffs the air, frowning. "Weird smell in here... Anyway, I got us all something to drink for the ride. Coke or Fanta, James?" Nicole asks warmly.

"I'll take uhh... Fanta." I feel like a robot as I speak, like I'm hollowed out inside.

"Here you go. You're really red James, do you feel hot?" She hands me the drink and her soft, cool, motherly hand lingers against my forehead.

"No, I feel okay, I-"

"Actually, can I have the Fanta?" Keira interjects sweetly. Nicole looks at her, taking her hand back.

"I only bought one, with two Cokes sweetie-"

"You don't mind, do you, James? She raises her eyebrows at me with a smug expression.

"No..." I say meekly, and hand it to her. Nicole tuts, and apologetically passes me the Coke. Keira opens the Fanta and takes a long, deep swig, whilst her mother starts up the car. Then she half-turns to me, making sure her mother isn't watching, and licks around the rim of the Fanta bottle, before sucking the top wetly, her soft pink mouth leaving a trail of spit along the edge.

"Actually, James, you can have it if you want." She stretches the bottle out towards me, her spit still glistening atop the rim, my hoody sleeve baggy on her tanned slender arm dotted with dark beauty spots. Nicole huffs and shakes her head as she turns the key in the ignition.

"Make your mind up, Keira!" She exclaims, before getting the clutch down and the car rolling.

Keira raises her eyebrows at me expectantly again. I take the bottle and hand over the Coke. She stares at me and a slight smirk tugs at the corner of her mouth. I sigh and lift the bottle, firstly tasting the warm wet spit of her mouth sweetened by her cherry chapstick before the sparkling orange washes it down my throat. Guess I deserve that for hornily sucking down her pussy juices earlier... Although she doesn't need to know about that specific detail. Satisfied, Keira turns back around and twists open the Coke with a fizz, then hums along as the radio kicks in and we're back out on the road.

__________________________________

As we walk through the bustling centre of the mall I look around, still feeling quite dazed, dazzled by the huge Christmas tree fenced off in the middle of the welcome area. To either side are various small shops adorned with spray snow and Christmas lights, Greggs and newsagents and a watch repair place. Nicole stands in front of us and checks her watch.

"Okay guys, it's half past ten now. I'm going to get some stuff you're not allowed to see yet." She winks. "You two get what you need and we'll meet at the food court in, say, an hour?"

We both nod, Keira ever obedient and innocent, looking up at her mother like butter wouldn't melt, dark blue handbag slung over her shoulder matching the colour of her jumper. Having reclaimed my hoody, my hands dwell in the pockets once more.

"Alright, guys. Don't have too much fun!"

With that, Nicole races off into the crowd in the direction of Topshop. I slowly turn and drag my feet in the other direction.

"Well, then." Says Keira sweetly. "Where shall we go first?"

"Listen, Keira..."

"I think we'll have a quick look in Primark. You can walk and talk." She's really lording it over me now, knowing she holds my fate in the palm of her hand.

"Okay, look. This morning I didn't get up when you got in the shower." We fall in with a steadily moving stream of people, in the direction of Primark. "I got up before then. I... Heard you. I didn't mean to! Your door was left ajar, and I-I just..." I begin to run out of words as I quietly try to explain without anyone else in the crowd hearing. The whole time Keira has a look of smug satisfaction plastered on her face. She raises one eyebrow, matching my low tone.

"So you spied on me, huh?" She teases.

"I didn't mean to- but, yeah, I suppose. I'm sorry. But why was the door open? It wasn't when I entered the bathroom." I say in quiet exasperation, cheeks reddening.

"It's my door, if I want to leave it open I can." She smiles cruelly. This side of her is something I've never seen, and I know she is relishing it - but despite the torment I can't bring myself to dislike her because of her mesmerising beauty. "Hmm, let's go in here!"

She pulls me by the arm out of the crowd and into an Ann Summers, giggling naughtily. I go even redder and try to pull her out.

"Keira! If Nicole sees us here..." I say in angry hushed tones.

"Then I'll show her the panties you messed in, and say you dragged me in." She giggles again.

I look around. The shop is pretty bare apart from a woman rifling through some skimpy thongs, a lone attendant by the dressing rooms, and a shady fat guy over by some of the XL lingerie. The arousing scent of perfume hangs in the air. Warily I follow Keira as she skips deeper into the store and turns a corner where there are a range of sex toys on display.

"Hmm... So you saw me playing with one of these." She purrs, holding up a box with the same small black vibrator. "Did you like what you saw?"

My cheeks go hot with shame again, but the mental image makes my cock grow, and I pray that enough of the blood stays in my brain so I don't make another stupid decision.

"I said I'm sorry. You don't have to mess with me - give me the panties and I'll throw them away, we never have to speak of it-"

Her eyes light up with glee as she grabs another, larger box and shows it to me.

"I've wanted one of these for ages." There's a mischievous glint in her eyes. It's a pink Jessica Rabbit 10-speed vibrator, the kind with about 7 inches of length and rotating beads in the middle, along with the vibrating rabbit extension to make her clit tingle. She leans in close, and I smell her freshly washed flowery hair and intoxicating perfume. Her sugary breath is hot in my ear as she whispers:

"If you want to make it up to me... buy it for me."

I am taken aback - shocked. She pushes the box into my chest and walks away again, humming daintily, examining other selections of panties and lingerie. I feel stuck again, wanting to put the box back, but the fire in my loins at the idea of getting to glimpse Keira using this... Fuck.

Feeling eyes burning into my back I turn to see the shop attendant looking quizzically at me, as I am now indecisively clutching the boxed dildo to my chest, my sweaty palms feeling melded to the plastic case. I've never done anything like this before. Trembling slightly from the butterflies in my stomach, I lift my feet out of the quicksand I find myself stuck in and approach the counter. My voice shakes.

"Uh, just this one, p-please." I hold out my credit card shakily.

"Would you like it gift-wrapped?" She asks, punching numbers into the till, the purchase of a dildo such a bland occurrence for her she looks appropriately bored.

"What?"

"Would you like it gift-wrapped?"

"Um..." I shake my head. "No. Sorry."

"Would you like a carrier bag?"

"No. Um! Yeah, please." I seem to be dropping the spaghetti in every single encounter I have today. She bags it in a pink branded Ann Summers bag and I pay £35 for my step-sister's dildo. She drops a receipt in.

"Enjoy, sir. Next please." I walk off and try and scrunch up the bag to stuff inside my hoody. I wait outside, wiping my clammy hands on my tracksuit bottoms as I try to avoid eye contact with the steady stream of shoppers, wishing I didn't feel so damn out of my depth.

Keira emerges a few minutes later with a bag of her own and a big, cute smile on her face.

"So?" She asks excitedly. I look around, making sure noone we know is here, then open my zip and show her. "Give it here!" She urges, grabbing the pink bag and stuffing it inside her own handbag, before placing her own bag on top of it and zipping it shut, the handbag noticeably full. Then she stands on her tiptoes and sweetly pecks my cheek, coming away with a wink."Thanks, big brother. Okay, we can actually go to Primark now."

Feeling flustered and slightly blue-balled by the images that come unbidden and vivid to my imagination of Keira with her new pink rabbit vibrator, I follow her into the crowd, stopping briefly whenever she wants to ogle some shoes or an outfit in a shop window. I find myself questioning just how deep a hole I will dig myself into by following my dick. In an abstract way these thoughts come to me, moments of clarity in-between waves of horniness that the imagined scenarios fuel.

It is in every swish of her shimmering ponytail as she looks back over her shoulder and smiles at me, the rhythmic bounce in her step, the hypnotic sway of her perfect ass in those tight jeans. The girlish squeals of excitement at offers in shop windows, the too-fast talking about situations between her friends that I don't much listen to. The way my stomach ties itself in knots as she teases me... Wait, am I actually falling for her here? Has my unrestrained lusting made an alchemical transmutation into full-blown love?

I shake my head and snap out of it as we reach Primark. What the fuck am I thinking? Less than an hour ago I was set to dispose of the shame of my mistake, never to speak of it again, and now I'm here thinking I might be in love with my eighteen year-old step-sister? Absurd! I think back to the car, to when she humiliated me and made me drink her spit... But a part of me can't deny the memory retroactively turns me on and my cock goes semi-erect.

"What are you doing?" Keira asks, puzzled. I realise I have completely wandered off from her, splitting into the mens section as she steps onto the escalator travelling to the upper level.

"I'm just gonna... Look for some jeans, down here. Catch up with you." I call back, and walk off quickly. I sit myself in the mostly deserted mens shoe area and hold my head in my hands.

Today has been a colossal trainwreck, and it's not even the afternoon yet. Now my mind and emotions are a whir of confusion. Is Keira just playfully winding me up? Leaving her door ajar was obviously intentional, but it seems she gets a thrill from behaving this way. If I could just think with my brain, and not my dick, I wouldn't be in this damn situation, and everything would still be simple!

In the middle of admonishing myself I feel my phone buzz in my tracksuit pocket. I fish it out to a text from Keira.

Come upstairs. Girl's changing rooms. End stall. Xx

I frown again, confused. What the hell kind of game is she playing? I text back.

I can't, men can't go in there.

My palms are sweaty once again and I curse my poor decision-making once again for putting me here. Phone buzzes again.

If you come quick, there's no attendant... Xx

I lock my phone and throw it down on the leather stool. Can I really do this? Whatever she wants is obviously going to be very wrong... But the feeling of sickly apprehension in my stomach feels like it is stifling a deeper fire of excitement. Phone buzzes again. Picture message received. My heart stops.

It's a selfie of beautiful Keira from her petite shoulders up. Her hazel eyes are two darkly seductive pools. She has taken her jumper off and all I can see are two light pink straps hanging off her shoulders, the rest of the lightly freckled and tanned skin exposed. In her hands she holds the rabbit vibrator, and her pouting lips softly kiss the silicon tip. She has let her hair down and it falls around her shoulders in a hot curly mess.

Slowly I rise, cock fully erect at the sight, and hold my phone out in front of me like some deranged compass. My feet move of their own accord. I feel mesmerised, slightly sick, sweating as I walk back to the escalator and ascend.

Gulping as I reach the top, I scan the area and see the fitting rooms in the far right corner. It's true, the fitting room attendant has been called over to the counter by the large line of Christmas shoppers, and they are left unguarded. I skirt right and dip between the racks of clothes.

I reach the area reserved for women's shoes that is directly next to the fitting rooms. I duck between two racks of winter boots and stick my head around. The pudgy female attendant is busy scanning many handfuls of socks into the till for an old woman, who stops her and claims she has double scanned a pair, which the attendant denies. As the heaven-sent raucous builds at the till I dart into the entrance. I'm in.

It's a short corridor of black curtain-covered stalls that turns left onto an even longer, stretching corridor of the same stalls. I can hear the rustling and zipping of clothes in these immediate stalls and quickly turn left, keeping my head down. As I continue down the long corridor they are less and less inhabited until I continue past five fully empty rows and reach the end. The stall to my right has its curtain only half-drawn - she must be in the left one. My heart is absolutely hammering in my chest and I can't remember the last time I drew breath. Hand trembling, I open the curtain slightly and slip inside, closing it magnetically behind me.

Before me, my step-sister is a sight of breathtaking sexual beauty. Keira stands a full head shorter than me in this closely confined space, gazing seductively up with her gleaming dark eyes. She wears nothing but a sheer pink nightie that hangs by the straps from her shoulders and it hides nothing; everything from her erect, perky nipples to her smoothly shaped navel and innie belly-button down to her clean shaven pubic mound is visible through the shimmering pink mesh. I drink her in, following down where the nightie ends at her teardrop thigh gap and her firm, tanned, toned legs continue, down to where her two small feet stand together with her silver-painted, pedicured toenails. The mirrored walls show me three endlessly replicating reflections of her perfect, peachy ass. Her soft, inviting flesh looks amazing and I long to touch her.

Almost salivating, I reach out my hands to bring her close to me, and she stops me. I try to speak but she only shushes me.

"Just watch." She whispers. I nod, cock straining against my tracksuit bottoms, electric energy shooting through it, magnetising me towards Keira. Slowly, maintaining our locked eye-contact, she leans back on the small changing-room bench and spreads her legs wide, showing me a full view of her perfect pussy. My reflection betrays to me my expression of utter tantalised longing.

Her gorgeous, young, pink pussy, without a scrap of hair in sight, is already partially wet and flushed with arousal. Showcasing her flexibility she gets her feet up on the bench at either side to maintain the wide spread of her legs and carefully, slowly, lifts up her nightie and rubs two fingers down her mound, slowly caressing just above her clit. In her other hand she holds the rabbit.

"You made me wait... So I had to play a little." She bites her lip. I am speechless. Her fingers move down a little further, massaging over the clitoral hood gently. She bites her lower lip. I drop to my knees.

"It's getting so wet..." With the same two fingers she traces down, always gently and seductively, looking at my eyes fixed on her sumptuous young pussy, and slowly parts the lips that separate with an audibly wet sound, and fingers herself gently. She pushes her fingers in further and curls them, closing her eyes in pleasure as she feels them hit her G-spot. The enticing wet sound reminds me of mixing tuna with mayo, or pasta and sauce.

She fingers herself like that a few more times, inserting and curling, brushing against it and withdrawing, then takes her fingers out and spreads the wetness all over her pussy lips, bringing them back up to her clit, massaging again, feeling the slowly building pleasure in her teenage pussy spreading through her pelvis, enhanced by the voyeuristic thrill.

"When you tasted my spit in the car, tell me, did you like it?" She asks in a breathy whisper. My cock is an iron stick of fire, and I want nothing more than to rip off my bottoms and enter her bareback, with no thought for the consequences. I nod wordlessly, staring at those two sparkling fingernails, silver amongst a sea of mouth-watering pink flesh, hypnotically massaging and then lifting the hood allowing her direct access to her clit, drawing an audible low moan from her.

"This morning, when you took my panties, did you sniff them?" I nod slowly. I'll do anything to fuck her now. She massages her clit in slightly faster circles, starts licking up and down the shaft and head of her dildo. I can't help myself and automaticallyfondle my rock-hard cock through my bottoms.

"Did you taste them?" She asks with a mischievous flash, then takes the head of the dildo in her mouth, sucking it, removing it with a pop.

I hesitate, then nod slowly, looking up at her with obedient puppy-dog eyes. She dips her two fingers back into her soaking wet pussy now and curls again, moaning deeply now.

"Do you want to taste me now?" She asks, biting her lip. I nod so hard I think my head may fall off. She plunges her fingers in deep, moaning and gyrating her hips against them softly then takes her fingers out of her pussy, sopping wet and sticky. Covered in her juices.

"Open." She whispers, and extends her arm. I melt as the scent of her pussy hits my nose first, the most enticing perfume I have ever smelled, and open my mouth to lean forward.

I suck the taste of her pussy hungrily, drinking it off her fingers, sucking all the way to the knuckle and back again. The taste, again salty and sweet like it was in her panties but now warm and fresh is amazing and I close my eyes to savour it as I tug my cock through my tracksuit bottoms. I hear the buzz of the vibrator start up and open my eyes, her fingers still in my mouth.

She holds the rabbit part of the vibrator against her pubic mound, the strength of the vibrations far greater than the small one in her room. Already her hips shake as she feels the electric tremors.

"I feel it already, it's so strong." She says, then takes back her fingers. She moves the vibrator aside and glazes her pussylips and clit with my spit. "Check if anyone is out there, I want to cum." She whispers hurriedly.

Somehow I wrench my gaze away from the erotic tableau and stick my head out of the curtain. I turn back and shake my head, still feeling robbed of my capacity for speech. Then Keira follows the same path her fingers did, holding the vibrating rabbit over her pubic mound then tracing down to just above her clit where her pink slit begins, then over her clitoral hood. The strong vibration there makes her legs shake and she nearly slips from the bench as she lets out a pleasurable moan.

"Oh fuck, that's good. I'm so wet."

I wish I could speak. I wish I could move and get up off my knees to fuck her, but I'm transfixed by the show. She changes position, kneeling on the bench away from me, palms of her hand against the mirrored wall so she can balance. This spreads her pussy and ass in my face and I shuffle closer to inhale the warm musk of her ass. Then she holds the rabbit flat and lowers her pussy down on it.

"Oh fuck, oh ffuck, James hold it there..."

My hands dart out and hold the rabbit in place, the cock part facing away from me, as she grinds her pussy against the part with the strongest vibration. From her frenetic motions and breathless panting I know from seeing it earlier that she has around thirty seconds of grinding on the rabbit before she cums hard on it.

Every time she rubs her wet pussy along the vibrator she moans, getting louder and louder, her ass pushing further back every time, the hot hairless puckered hole almost touching my nose. The tight skin is darker than her pussy but still so inviting, just a hint of musky sweat hanging there.

I hold the vibrator steady for her with my left hand and take my cock out, still on my knees, and start furiously beating my meat. She hears this and moans hard and loud, both hands against the mirror, leaning against it, pushing her shaking, shuddering hips down and grinding her soaked young quivering pussy against that vibrating pleasure.

"Fuck, James, cum with me." She moans in ecstasy. Her ass is jerking back and forth in front of me, and right of the edge of cumming, I make another decision.

I push my face forward between her perfect asscheeks and bury it in her hole, inhaling the perfect musk. She gasps but doesn't stop riding along the rabbit, shoving her ass hard against my face. I shove my tongue in her asshole and lap against it, the hot salty taste and the depravity of the act sending me over the edge as Keira's moans and pleasure cries begin to shake the walls and she grabs a fistful of my hair and shoves my face so my tongue lodges into her gripping ass and she finally twitches and shakes as orgasm grips her body.

"Oh... my... Fucking... God..." She pants like a possessed woman, shaking and trembling as she cums three, four, five times, my entire world her puckering asshole as I am deprived of breath and she cums again and again, shoving and grinding back against my tongue, bucking and lifting off the vibrator as the sensations become too much.

A second before I think I'm going to pass out I reach a delirious ecstasy and cum hard, shooting ropes and ropes of jizz at the floor of the fitting room below the bench, painting the hardwood floor. Her pelvis shakes and trembles still as her own orgasmic pleasure begins to ebb and recede, breathing hard, small little gasping moans still escaping until we both reach silence apart from the low buzz of the vibrator and I retract my tongue from her asshole, seeing stars.

"Oh, fuck." Says Keira between gulps of air. She switches off the vibrator. "Was I loud?"

She bites her lip worriedly and sticks her head round the curtain. There is definitely some commotion coming from the initial cluster of stalls around the corner.

Like lightning she pulls the nightie over her head and pulls on her jumper and her jeans, not bothering to replace her black bra and panties. Slipping on her shoes, she begins to put her messy hair back up into a ponytail.

"Don't just sit there slack-jawed!" She hisses, then looks down at puddle of cum I shot. "Ew. I think I stepped in it."

Piling the vibrator, the nightie, her bra and panties and her socks into the bag, she takes a second to breathe and compile herself. She checks herself in the mirror while I weakly pull my bottoms back up, trying to come to terms with what is going on.

"What are we going to do?" I ask nervously. "They obviously heard us. Well, heard you."

"Don't pin this on me!" She bites her lip again, insatiably cute when she does so. "Okay, I have a plan. Go to the stall directly across from this one, let me go first."

I obey her, not having any better ideas myself. She clears her throat and fully composes herself, then winks at me playfully.

"That was fun. Never had anyone's tongue in my ass before." Then she draws the curtain shut on me and walks out.

I chew my nails nervously and can't help but catch the taste of her salty ass and whiffs of musk on my breath from time to time. I strain my ears to hear the conversation as Keira speaks to the attendant.

"Hey? Yeah, I think there's someone back there..."

The attendant responds inaudibly.

"Yeah, thanks."

Footsteps coming down the corridor towards me. My heart leaps into my throat. She fucking sold me out!

The attendant must be about halfway down the hall now. She calls out.

"Listen, anyone in here, it's against the law to do anything like that in these stalls. It's disgusting. The police have been called, so just come out now."

The police?! Oh fuck... Talk about outed as a pervert, now I'm going to end up on the sex offender's register?

"I know you're in here!" I hear her start systematically opening curtains one by one on each side. My head is in my hands as I pray to God for a sinkhole open below my feet and swallow my entire being into it. I hear the curtain rack of the stall next to mine get pulled back and almost have a heart-attack as my phone rings and I pull it out and silence it. It's Nicole. I'm four minutes late to the food court.

"A-ha!" Exclaims the attendant, ripping back the curtain and exposing my terrified form. She's a dumpy woman, about the same size as me and wide. I emerge shamefully.

"The police are on their way for you, pervert. I heard a woman too, she in there?" She nods to the stall where I tongued Keira's ass as she came. I nod meekly. She rips open the curtain and freezes as her face screws up in disgust.

"Did you..." She can't take her eyes off the puddle of cum on the fitting room floor.

I figure this is the only opportunity I'm gonna get.

I fucking sprint for my life.

"HEY!" she screams as my adrenaline-fuelled feet hammer down the long hall of curtained rooms. I fly around the corner and shoulder through a group of five women all gossiping furiously around the entrance to the changing rooms, their shopping bags clattering to the floor as their shouts are drowned out by the roaring blood in my ears and I sprint past.

As fast as my legs will carry me I race at full pelt out of the second floor Primark entrance, merciful not to see a security guard on my tail. I leg it past the elevators and down two flights of stairs, the air whistling in my ears as I leave it all behind, coffee shops and outlet stores and all the miscellaneous places imaginable are nothing but a blur as I take advantage of the sprawling labrynthian nature of the shopping centre in my escape.

I slow to a walk and join a slow-moving herd of shoppers, heart pounding, casting quick looks back over my shoulder to see if I have been followed. My phone must have buzzed at least five more times in my pocket. I spot a minimally-congested clothing store and dip inside, seeing varieties of unbranded hats and hoodies. I take a minimalist black baseball cap and a cream-coloured pullover hoody to the desk and pay, trying to hide how bad my lungs are attempting to bust out of my chest. He bags my purchases and hands them to me.

Once outside I dip follow a corridor beside the shop into one of the quieter men's restrooms in the shopping complex. I take off my grey hoody and pull on the cream one, sticking my old one in the bag and placing the cap on my head.

I take a second to breathe and compose myself in the mirror. My green eyes are wild and pupils dilated, I'm sweaty and my face is deeply red from running. I lean against the sink and just run the events back in my mind, shaking my head, then find myself chuckling, eventually laughing loudly to myself at the absurd situation. I just sprinted for my life from a fat fitting room attendant, how's your Friday going?

My phone buzzes again. I fully catch my breath and take one more second to compose, then answer.

"Hey, Nicole." I almost sound normal.

"James, where are you? We're at the food court. Keira said you took off while she was in the fitting rooms?" That bitch. If only she wasn't so damned smoking hot.

"Yeah, my bad." I take it in my stride, wondering where this cool confidence has come from. "I dipped out to look for a hat."

Nicole giggles a little and I hear her chatter to Keira. I'm not widely known as a hat guy.

"Well hurry up, we can't wait to see it - plus, we're starving!"

"No problem. I'll be a couple minutes. See you soon." I click the phone off, feeling the pulse of rushing adrenaline in my veins start to die down. I take a final look at myself in the mirror, and can't help but crack a smile before I go.