I slammed the door behind me and kicked off my boots, still tasting the whiskey from the bar on my tongue. Mom was in the kitchen wearing nothing but an apron, her big tits spilling out the sides, and Dad had his hand down his pants on the couch like he owned the place. My sister Lisa was already on her knees between his legs, sucking his cock like she was starving for it.
"About time you got home, big brother," Lisa said, pulling off Dad's dick with a wet pop. Spit ran down her chin. "We've been waiting for you to join the fun."
Mom turned around, untied the apron, and let it drop. Her pussy was shaved smooth and glistening. "Strip, honey. Tonight the whole family's playing."
I didn't waste time. Shirt, jeans, boxers hit the floor. My cock was already rock hard, pointing straight at them. Dad grinned and patted the couch next to him. "Come here, son. Your sister's mouth is magic, but she needs a break."
Lisa crawled over to me on all fours, ass up, and swallowed my cock in one go. Her tongue worked the underside while she moaned around it. Dad reached over and grabbed her hair, pushing her deeper until her nose pressed against my stomach. "That's it, take your brother's cock like a good girl."
Mom climbed onto the couch and straddled Dad's lap, sinking down on his thick dick with a loud groan. She rode him slow and dirty, tits bouncing, while she watched Lisa blow me. "Look at them, baby," she said to Dad. "Our kids are so fucking hot together."
I grabbed Lisa's head and fucked her throat, hips snapping. She gagged but didn't pull back, just took it, drool pouring down her tits. When I pulled out she gasped, "Fuck my face harder, bro. I want it rough."
Dad flipped Mom onto her back and pounded her, the couch creaking. "Get over here, son. Eat your mother's pussy while I fuck her."
I dropped between Mom's spread legs and licked her clit while Dad's cock slid in and out right above my face. I could taste both of them. Mom grabbed my hair and ground against my mouth. "Yes, baby, lick it. Taste Daddy's cock in me."
Lisa wasn't idle. She got behind me, spread my ass, and shoved her tongue against my hole. I groaned into Mom's cunt. The wet heat of my sister's tongue pushing inside me made my cock leak onto the floor.
Dad pulled out of Mom and slapped his wet dick against my cheek. "Suck it, boy. Taste your mom on it."
I opened up and let him fuck my mouth. Mom and Lisa both watched, fingering themselves. Lisa moaned, "God, that's so fucking hot. Suck Daddy's cock, big brother."
We moved to the bedroom. Mom got on all fours and I slid into her from behind while Dad fed his cock to Lisa. Then we switched. I fucked Lisa while she ate Mom out, and Dad took turns fucking both of us. He buried himself in my ass while I was balls-deep in Lisa, the three of us rocking together.
Mom climbed on Lisa's face and rode her tongue, then reached back and stroked my balls. "Fill your sister up. I want to see it leak out of her."
I came hard, pumping thick ropes into Lisa's tight cunt. Dad pulled out of my ass and shot across Mom's tits. Lisa licked it off while Mom fingered the cum out of her and fed it to me.

We didn't stop. Round after round. Mom riding my face while Lisa sucked me hard again. Dad fucking Lisa while I fucked him. Sweat, cum, moans, the whole house smelling like sex.
By morning we were all tangled on the bed, covered in each other's come, already planning the next night. No one was leaving this house without getting fucked by everyone else.