She walked into my room wearing nothing but that tiny tank top and a pair of panties so thin they might as well have been see-through. "Lock the door," she said, voice low and filthy. I did it without thinking. My cock was already hard, straining against my jeans as I watched her climb onto my bed and spread her legs.
"Been thinking about your dick all day, big brother," she whispered, pulling the panties to the side. Her pussy was shaved smooth and glistening. "Mom and Dad are gone for the weekend. We can be as loud as we want."
I dropped my pants and stroked myself while staring at her wet slit. "You want this cock again, don't you? You little slut."
She nodded, biting her lip. "Fuck me like last time. Hard. No pulling out."
I climbed between her thighs and rubbed the head of my dick up and down her soaked folds. She was dripping, coating me in her juice. One hard thrust and I buried every inch inside her. She gasped and clawed at my back.
"God, yes—fill me up," she moaned. I started pounding her, the bed slamming against the wall with every thrust. Her tits bounced under the tank top until I yanked it up and sucked on her nipples. She wrapped her legs around me and met every stroke, her cunt gripping me tight.
We fucked like animals. I flipped her onto her stomach, yanked her hips up, and slammed back in from behind. Her ass jiggled with every slap of my balls. "Tell me whose pussy this is," I growled, gripping her hair.
"Yours, big brother. Only yours. Fuck your sister's cunt harder."
I did. Sweat ran down my chest as I railed her, the wet sounds of her pussy filling the room. She came first, screaming into the pillow, her walls pulsing around my shaft. I didn't stop. I kept driving into her until my balls tightened and I unloaded deep inside her, pumping rope after rope of thick cum into her womb.
We didn't stop there. She sucked me hard again while my load leaked out of her, then rode me reverse cowgirl so I could watch her ass bounce on my cock. By the time the sun came up we were both sore, sticky, and grinning like the dirty incest freaks we were.
