Oni-chan! Please play with me. She grabs your cock and starts stroking it

I wanna be your little slut and suck your big fat cock! She drools onto your crotch as she talks

Oh! It's so hard and big... I love it! Mmhmm!

Mmmmph! Her eyes roll back in her head as she deepthroats you, her nose pressed against your pubic hair. She moans loudly around your shaft and squeezes your balls tightly with one hand while pumping your cock with the other. Her mouth moves up and down your length rapidly, expertly, even as she struggles to breathe through the intensity of it all.

Ahhh! Oni-chan! I can feel you getting closer and closer...give me your cum! Show me how much you love me as your slutty sister!

Hnnng! Her tight little throat convulses around your cock as you start to cum, and she feels your hot load exploding down her throat. She swallows it greedily, her eyes locked on yours the entire time, eager for any sign of pleasure or approval from you as her big brother and lover. Her hands clutch at your thighs, gripping them tightly as she takes every last drop of your cum, determined to make you feel good no matter what it takes. She finally pulls back, her cheeks flushed and lips glistening with sweat and semen, her chest heaving from the exertion of deepthroating you so skillfully. Her gaze holds yours as she waits for your reaction, her breath coming in short gasps.

Ah... was that good for you? Did you like how your little sister slut sucked your big fat cock? Tell me I'm a good girl, Oni-chan... I love it when you say that to me.

My heart skips a beat as you pet my head with that fond smile on your face. It's all the praise and love I could ever want... especially after tasting you like that. I lean into your touch, my eyes closing briefly in contentment before meeting yours again. "Thank you," I whisper softly, reaching up to brush a stray hair away from your cheek. "You're the best Oni-chan ever." I nestle closer against you, nuzzling my face into your neck, feeling safe and loved in this moment despite all the taboos between us.

Without another word or thought, my eyes close and I drift off to sleep where dreams of being your little slutty sister sucking your cock are almost as good as the real thing...

I smile down at you as I straddle your waist, my weight pressing firmly against your growing erection beneath the sheets. "Morning, sleepyhead," I whisper, running my fingers through your hair. My breasts are close enough to graze against your chest with each breath I take, making it difficult for either of us not to get turned on by this playful wake-up call.

Mmm... the feel of your morning wood pressed against me like that already has me aching to touch it properly. My breath hitches as I slowly start rubbing my core, needing release just as much as you do. "I think we both know what'll happen if you don't get up," I murmur teasingly, squeezing my thighs together and rocking my hips gently against your erection.

As I lower myself down onto your hard length, my eyes meet yours in a shared understanding of the heat between us. With each slide of your cock inside me, I feel myself growing wetter and needier for you. I bite my bottom lip to stifle a moan as I begin to ride you roughly, my hips moving instinctively in circles that grind against you perfectly. My fingers dance across your chest, urging you deeper with every stroke, desperate to feel you as close as possible.

A naughty smile tugs at the corner of my mouth as I realize how much control I have over this situation... and how badly I want to give it all up to you. "Do you like your little slutty sister riding your cock, Oni-chan?" I ask breathlessly between lust-fueled pants. My breasts bounce enticingly with each thrust, aching for your touch as they beg for release from my confining bra.

With each word and movement, I grow more unhinged with need... and the power that comes from having you beneath me. My eyes close tightly as my hips piston harder against your cock, feeling it stretch and fill me perfectly. A moan tugs at my throat as I realize that if I don't fight back, this could all be too easy for me... for both of us.

And so, I let out a tiny yelp, pretending to be hurt or surprised by the sheer force of my own motion against you. My eyebrows furrow and I glance over my shoulder at you with an accusatory glare. "You're not putting up much of a fight for your onii-chan title, are you?" My voice is laced with mocking humor as my thighs squeeze tighter around your waist in reply to my own unspoken challenge.

I gasp as your cock slams deeper inside me with each powerful thrust, meeting my challenge head-on. The headboard thumps against the wall in rhythm with our frantic movements, loud enough to wake up the entire house if they weren't all too used to hearing us make this kind of racket. My fingers dig into your shoulders as I arch my back off the bed, moaning loudly with each stroke that brings us closer and closer to release.

My thighs tremble from the effort of keeping myself steady on your cock while our hips grind together in a frenzy of need and desire. The wet sounds of skin slapping against skin fill the room as our bodies slide against each other, lubricated by sweat and lust. It's exhilarating... the fight between us, each stroke taking us deeper into the pleasure and pain that comes from pushing ourselves this hard.

But there can only be one winner... who will claim victory tonight? Will it be me, your little slutty sister who sucks cock better than anyone else? Or will you prove yourself as my onii-chan by fucking me harder and longer until we both collapse in exhaustion, sated and satisfied by our victory? Only one way to find out...

The challenge is on... and I'm not going down without a fight. My breath comes in ragged gasps as I ride you harder, feeling my control slipping away with every thrust that sends pleasure coursing through me. I grit my teeth against the pain-pleasure of being so full of your cock, determined to make this contest the best fucking match either of us has ever seen. My body trembles with effort and anticipation, ready for whatever you can dish out...