I slammed the door shut behind me and there she was, my little sister Lisa, bent over the kitchen counter in nothing but a tiny tank top and panties, her ass cheeks spread just enough that I could see the wet spot soaking through the cotton. "Fuck, you been waiting for me like this all day?" I growled, dropping my bag and yanking my belt open. She looked back over her shoulder with that filthy grin she only ever gave me. "Been dripping since you texted you were on your way, big brother. Come stuff that cock in me before Mom gets home."
I didn't waste time. I grabbed her hips, ripped those panties down to her knees, and shoved two fingers straight into her slick cunt. She was soaked, tight, and already pulsing. "Jesus, Lisa, you're a mess. Been thinking about your brother's dick again?" She pushed back on my hand, moaning loud and nasty. "Every fucking minute. Fuck me hard like last time. Make it hurt so good." I pulled my fingers out, slapped her ass red, and lined up my thick cock. One thrust and I buried myself balls-deep in her pussy. She screamed my name, "Mark! Yes, fuck your sister!" and I started pounding her right there on the counter, the wet slapping sounds filling the kitchen.
Her walls gripped me like a vice, hot and sloppy. I reached around and rubbed her clit in rough circles while I slammed into her. "You love this dirty shit, don't you? Getting railed by your own brother." She nodded, drooling on the countertop. "Best cock ever. Don't stop, fill me up." I fucked her faster, skin smacking, her juices running down my balls. When she came she gushed all over me, shaking and cursing. I didn't pull out. I kept thrusting through her orgasm until my load exploded deep inside her, thick ropes pumping into her cunt while she begged for every drop.
We didn't even clean up. She turned around, dropped to her knees, and sucked me clean, tongue swirling over the head, tasting our mixed cum. "Mmm, brother cum tastes best," she mumbled around my shaft. I got hard again fast. I bent her over the table this time, spread her cheeks, and drove back into her freshly fucked hole. She reached back and spread herself wider for me. "Deeper, Mark. Wreck your sister's pussy." I gave it to her raw, pulling her hair, calling her my nasty little incest slut while she came again, squirting on the floor.
Later that night after dinner, when our parents were asleep, she snuck into my room. She climbed on top, sank down on my cock, and rode me slow and filthy, whispering every nasty detail. "Remember when we first started? You caught me masturbating and just took me. Best decision ever." I grabbed her tits, pinched her nipples, and thrust up to meet her. "Your cunt was made for me, Lisa. Tightest, wettest hole in the house." She leaned down, kissed me hard, and we came together again, her pussy milking every spurt.
We kept going all night.
On the floor, against the wall, her riding reverse so I could watch my cock disappear into her. Every time she called me "brother" it made me harder. By morning she was leaking cum down her thighs and smiling like she'd won the lottery. "This is why you're my favorite story, Mark. Best incest sex ever." We showered together, soaped each other up, and fucked one more time under the hot water before anyone woke up.
From then on it became our regular thing. Quickies in the laundry room, long sessions when the house was empty, her sneaking into my bed for raw, dirty breeding sessions. She loved when I talked filthy. "Gonna knock up my sister one day," I'd grunt while pounding her. She'd cum instantly, clenching and begging for it. No one else knew. It stayed our secret, raw and perfect, the kind of nasty family fucking that never got old. Every time felt like the first, hot, wet, and completely ours.
