I walked into the kitchen and there she was, my sister Lisa, bent over the counter in nothing but a tiny tank top and thong. She was twenty-five, I was twenty-eight, and we had been circling this shit for months since Mom and Dad moved out.
"Fuck, Lisa," I said, my cock already hard in my jeans. "You know what that ass does to me."
She looked back over her shoulder, smirking. "Then stop talking and do something about it, big brother.
I've been waiting all day for you to shove that dick in my ass."
I didn't need more invitation. I stepped behind her, yanked the thong down, and spread her cheeks. Her asshole was tight and pink, winking at me like it knew what was coming. I spit on it, rubbed the head of my cock against the hole, and pushed.
Lisa groaned loud as the tip popped in. "Yeah, stretch my ass, you dirty fuck. Deeper."
I grabbed her hips and drove in slow but steady, every inch disappearing into her hot, gripping hole. She was so fucking tight it almost hurt, but she pushed back, taking me balls deep. Her ass cheeks slapped against my thighs when I bottomed out.
"Goddamn, your ass was made for incest cock," I growled, pulling out halfway and slamming back in. "Little sister's asshole taking her brother's dick raw."
She reached back and spread herself wider. "Harder. Pound it. I want to feel it tomorrow."
I fucked her ass like I owned it. Fast, rough thrusts that made her tits bounce and her moans turn into filthy begging. "Fuck my shithole, brother. Fill it up. Cum in my ass like the sick fuck you are."
Sweat ran down her back. I reached around, found her clit, and rubbed it while I drilled her. Her asshole clenched and fluttered around my shaft every time I bottomed out. The wet, nasty sounds of anal sex filled the kitchen.
"Don't stop," she panted. "I'm gonna cum with your cock in my ass."
I kept the pace brutal, hips snapping, balls slapping her pussy. She came hard, screaming, her ass spasming and milking me. That pushed me over. I buried myself to the hilt and unloaded, pumping thick ropes of cum straight into her guts.
We stayed locked together, breathing heavy, my cock still twitching in her flooded asshole. When I finally pulled out, cum leaked down her thighs.
Lisa turned around, kissed me messy, and said, "Round two in my room. This time I want you to fuck my ass while I call you brother the whole time."
I was already hard again.
