I slammed the door behind me and there she was, my big-titted sister standing in the kitchen in nothing but a tiny tank top that barely held her massive tits. They were fucking huge, heavy and round, nipples poking through the thin fabric like they wanted out. "You home early," she said, not even trying to cover up. Her tits jiggled with every word.
I didn't answer with words. I walked straight over, grabbed both of those fat tits in my hands and squeezed hard. She gasped but didn't pull away. "Fuck, you've been staring at these for years," she muttered, voice already getting husky. I yanked the tank top down and her big tits spilled out, full and warm, the kind of tits you dream about burying your face in. I sucked one thick nipple into my mouth and she moaned, pushing more of that soft tit flesh against me.
"Lock the door," she said. I did. Mom and Dad were gone for the weekend, so the house was ours. She dropped to her knees right there on the kitchen floor and pulled my cock out. "Big sister gets first taste." Her mouth was hot and wet, lips stretching around my shaft while her huge tits bounced with every bob of her head. She took me deep, gagging a little but not stopping, spit running down her chin and dripping onto those swinging tits.
I fucked her mouth for a minute, then pulled her up and bent her over the counter. Her shorts came down and her ass was perfect, but it was those big tits I wanted to watch. I reached around and grabbed them, squeezing while I shoved my cock into her tight pussy from behind. She was soaked already. "Harder," she grunted. "Fuck your sister's cunt." I slammed into her, her big tits slapping against the counter with every thrust, the sound wet and filthy.
We moved to the couch. She climbed on top, those massive tits hanging in my face as she sank down on my cock. I sucked and bit at her nipples while she rode me, grinding her clit against me, moaning like a slut. "You like these big tits, don't you? Always wanted to fuck your own sister." I answered by thrusting up hard, making her tits bounce wildly.
She came first, pussy clenching around me, but I wasn't done.
I flipped her onto her back, spread her legs wide, and fucked her deep while I mauled her tits. Her nipples were red from my mouth and hands. I pulled out at the last second and shot thick ropes across her stomach and those huge tits, painting them white.
We didn't stop there. That night we fucked in every room. In the shower she soaped up her big tits and let me fuck the slippery valley between them until I came on her face. In Mom and Dad's bed she rode me reverse, those fat tits swinging while I slapped her ass. She begged for it rough and I gave it to her, calling her my dirty incest slut every time my cock stretched her pussy.
By morning we were still going. She woke me up with her mouth on my cock again, big tits pressed against my thighs. "One more before they get home," she whispered. I fucked her on the living room floor, her legs over my shoulders so I could watch those tits shake with every thrust. When I came inside her this time she held me there, clenching around me, both of us breathing hard.
We cleaned up just enough to look normal when the parents walked in. But later that week, when they were asleep, she snuck into my room again, big tits already out, ready for more. The free stories don't lie. Once you start fucking your own sister's huge tits and tight cunt, you don't stop.
