I came home late from college and the house was quiet, but the lights were on in the living room. When I walked in, Mom was already naked on the big sectional, legs spread wide while Dad pounded into her from behind. Her heavy tits swung with every thrust and she was moaning like a slut.

My sister Lisa stood next to them, also stripped bare, fingering her shaved pussy while she watched.
Fuck, look whos home, Dad grunted, not missing a stroke. Get naked, son. Your moms been waiting for that cock.
Mom turned her head and smiled at me, eyes glassy with lust. Strip, baby. Were all family here. No clothes allowed tonight.
I dropped my clothes right there. My dick was already hard. Lisa came over, dropped to her knees, and took me straight into her mouth without a word. She sucked hard and sloppy, spit running down my shaft while Mom and Dad kept fucking a few feet away.
Dad pulled out and slapped Moms ass. Ride him, he told her. Mom crawled over, straddled me on the couch, and sank down on my cock in one smooth motion. She was soaking wet and hot inside. She started bouncing immediately, tits bouncing in my face.
Lisa climbed up and sat on my mouth. I licked her pussy while Mom rode me. Dad moved behind Lisa and started fucking her from behind while she ground on my tongue. The whole room smelled like sex and sweat.
We switched positions constantly. Mom on all fours getting fucked by Dad while she sucked me. Lisa riding my cock while Mom sat on Dads face. At one point I was fucking Lisa doggy-style while she ate Moms pussy and Dad fucked Moms mouth. Everyone was loud, filthy, no holding back.
Fill your sister up, Dad ordered. I came deep inside Lisa, pumping load after load while she moaned into Moms cunt. Dad pulled out of Moms mouth and shot across her tits. Mom rubbed the cum into her skin and licked her fingers.
We didnt stop for hours. We fucked in every combination possible, bodies slick and tangled on the living room floor. When we finally collapsed, we stayed naked together, touching and kissing until we were ready to start again. No one put clothes back on until morning.