The three of us had always been close, too close, but that summer everything snapped. Mark, 28, home from the city, me at 26, and our little sister Lisa, 24, still living in the old house. One humid night after too many drinks, Lisa stripped off her tank top right in the living room and said, "I want both my brothers' cocks tonight." Mark and I looked at each other, then at her full tits and shaved pussy, and we were done pretending.
Mark grabbed her first. He shoved her onto the couch, spread her legs, and buried his face in her cunt, licking her clit in hard, sloppy circles while she moaned and pulled his hair. I dropped my shorts, my dick already rock hard, and fed it to her mouth. She sucked me deep, gagging on the thickness, spit running down my balls as she worked her tongue around the head. "Fuck, sis, that's it," I growled, thrusting into her throat.
Mark stood up, lined his cock up with her dripping hole, and slammed in balls-deep. Lisa screamed around my dick as he started pounding her, the wet slap of skin on skin filling the room. "Your pussy's so tight," he grunted. "Been wanting to fuck my sister for years." He pulled out, flipped her onto all fours, and drove back in from behind while I knelt in front so she could keep sucking me.
We switched. I took her pussy next, gripping her hips and fucking her hard and fast, watching her ass jiggle with every thrust. Mark moved to her mouth, making her taste her own juices on his cock. Then he pulled out, pushed her down flat, and straddled her chest so she could lick his balls while I kept railing her. "Suck them both," he ordered. Lisa opened wide and took turns, sloppy and eager.
Mark wanted more. He lay back on the floor and pulled Lisa on top to ride him reverse cowgirl. I knelt between their legs, watching his thick cock stretch her cunt, then pressed my own dick against her asshole. "Gonna fuck your ass while Mark's in your pussy," I said, spitting on her hole and pushing in slow. She was so tight it almost hurt, but once I was buried we started moving together, double-stuffing our sister. Lisa howled, coming hard, her holes clenching around both our cocks.
We didn't stop. Mark pulled out and shoved his cock into my mouth so I could taste Lisa on him. I sucked my brother while still buried in her ass, then we swapped again. He took her ass while I fucked her pussy from underneath. Cum was everywhere, hers and ours, slicking everything. Lisa begged us to fill her, so we did, Mark unloading deep in her ass while I pumped her cunt full. She collapsed between us, shaking, our cum leaking out of both holes.
We kept going until morning, taking turns, sometimes me and Mark stroking each other while Lisa watched and fingered herself, sometimes all three tangled together with no idea whose cock or tongue was where. By sunrise we were sore, sticky, and already planning the next time. No more secrets, just raw family fucking whenever we wanted.
