I slammed the bedroom door behind me and pressed my back against it, heart hammering. My sister Lena was already on my bed, legs spread, fingers working her slick cunt like she owned the place. She looked up with that filthy grin and crooked a finger.
"Lock it," she said. "Mom's passed out."
I clicked the lock and stripped fast, yanking my tank top over my head and shoving my shorts down. My nipples were tight, my pussy already dripping.
Lena had been teasing me all night at dinner, sliding her foot up my leg under the table until I was soaked through my panties.
"Come here and sit on my face," she ordered, voice low and dirty. "I want that sweet sister pussy on my tongue right now."
I climbed over her, knees on either side of her head, and lowered myself. Lena grabbed my ass with both hands and dragged me down onto her mouth. Her tongue shoved straight up inside me, thick and hot, licking deep before she sucked my clit hard. I moaned loud, grinding on her face.
"Fuck, Lena, eat it," I gasped. "Suck your little sister's cunt like you mean it."
She groaned into me, the vibration shooting straight through my core. Her tongue flicked fast over my swollen clit, then she sealed her lips and sucked, noisy and wet. I rode her face, hips rolling, tits bouncing. One of her fingers slid between my cheeks and pressed against my asshole, rubbing in tight circles before pushing inside.
I came hard, thighs shaking, juices flooding her mouth. Lena kept licking, drinking every drop, tongue fucking me through it until I was whimpering.
She flipped me onto my back before I could catch my breath. "My turn. Spread those legs."
Lena climbed between my thighs, rubbing her dripping pussy against mine. Our clits slid together, wet and hot. She started grinding, slow at first, then harder, our slick folds kissing with every thrust. The sound was obscene, wet and filthy.
"Look at us," she panted, eyes locked on mine. "Two sisters scissoring like fucking sluts. You love your big sister's cunt on yours, don't you?"
"Yes," I hissed. "Harder. Rub that clit on me."
She picked up the pace, hips snapping, our juices mixing and dripping down my ass. Lena reached down and spread my lips wider so our clits could grind directly. Every stroke sent sparks up my spine. She leaned in and sucked one of my nipples into her mouth, biting just hard enough to make me cry out.
I grabbed her ass, pulling her tighter, and we fucked like that until we were both shaking. Lena came first, grinding down hard, her clit pulsing against mine. The feeling pushed me over again. We kept moving, riding the aftershocks, until we were both slick and trembling.
Lena collapsed beside me, breathing hard. She slid two fingers into my still-twitching pussy and pumped them slowly.
"Round two," she whispered, voice rough. "I'm not done with this sister cunt tonight."
She rolled me onto my stomach, pulled my hips up, and buried her face between my cheeks. Her tongue licked from my clit all the way back to my asshole, then pushed inside while her fingers worked my cunt. I shoved my face into the pillow and moaned, pushing back against her mouth.
Lena ate my ass like she was starving, tongue fucking it deep while she fingered my pussy rough and fast. When I was dripping down her wrist she pulled back, lined up, and sank three fingers into my cunt while her thumb pressed against my asshole.
"Come for me again," she demanded. "Come all over your sister's hand like the dirty incest slut you are."
I did, hard, walls clenching around her fingers, ass pushing back for more. Lena kept working me until I was limp and whimpering, then pulled me into her arms.
We lay tangled together, sweaty and satisfied, her fingers still lazily stroking my swollen pussy.
"Tomorrow night," she murmured against my ear, "I'm bringing the strap-on. I want to fuck this tight sister hole until you scream."
I smiled into the dark, already wet again at the thought. Our secret was filthy, wrong, and the best thing either of us had ever had.
