She was already naked on my bed when I walked in from work, legs spread wide, fingers buried deep in her shaved cunt. "Took you long enough, big brother," she said, voice thick with need. "I've been fucking myself thinking about your cock all day."
I didn't waste time with questions. We both knew the rules. No one else could ever find out, but behind closed doors we were animals. I stripped fast, cock already rock hard and leaking, and climbed between her thighs. Her pussy was soaked, dripping onto the sheets. I slammed into her in one rough thrust and she moaned loud, clawing at my back.
"Fuck yes, fill your little sister up," she growled. "Pound that incest cock into me."
I did exactly that. No slow teasing, just hard, dirty fucking.
My balls slapped against her ass with every thrust while she begged for more. "Deeper, brother. Wreck my cunt." Her walls clenched tight around me, milking every inch. I grabbed her tits, pinched her nipples hard, and she came with a scream, juices squirting around my shaft.
I flipped her onto all fours and drove back in, watching her ass ripple. "You love your brother's dick, don't you?" I snarled, spanking her. "Say it."
"I fucking love it," she gasped. "Love being your dirty incest whore."
I reached under and rubbed her clit in fast circles while I fucked her. She came again, body shaking, but I didn't stop. I pulled out, shoved her face down, and buried my tongue in her ass, licking and spitting until she was begging for my cock there too. I pushed in slow at first, then fucked her ass raw while she fingered her own pussy.
When I was close I yanked out, flipped her again, and shoved my cock down her throat. She took it all, gagging and drooling, eyes watering. "Swallow your brother's load," I ordered, and pumped thick ropes straight into her stomach.
We didn't stop there. She rode me next, grinding her clit against me while I sucked her nipples. Then I bent her over the dresser and fucked her standing, watching us in the mirror. Her face was pure lust, mouth open, tits bouncing. "Tell me how much you want my cum inside you," I said.
"Fill your sister's cunt," she begged. "Breed me with that forbidden load."
I exploded deep, pumping her full while she came one more time. We collapsed on the bed, sweaty and panting, already planning the next round. No guilt, just raw need. She was my sister, and that made every filthy thrust hotter. We kissed slow and deep, tongues tasting each other, knowing we'd do it all again as soon as we caught our breath.
