She was bent over the kitchen table when her father-in-law walked in, her short dress hiked up and her bare ass spread wide. I watched from the hallway, cock already throbbing, as the old man dropped his pants without a word and slammed his thick dick straight into my wife's dripping cunt.
"Fuck, yes," she moaned, pushing back hard. "Give it to me, Daddy. Pound that married pussy."
He grabbed her hips and hammered her, balls slapping loud and wet. "You love this old cock, don't you, you filthy slut? Better than your husband's?"
"Way better," she gasped, tits swinging. "But I want more. Call our boy in here."
I didn't need the invitation. I stepped forward, already stripping, my dick rock hard and leaking. Mom turned her head, eyes glazed with lust, and opened her mouth for me. I shoved in deep, fucking her throat while Grandpa wrecked her from behind.
She gagged and slurped, spit running down her chin as I used her mouth like a fuckhole. Grandpa grunted, driving deeper. "That's it, boy. Feed your mother that cock. We're all family here."
Her pussy clenched around him when she came, squirting down her thighs. He pulled out and shoved her to her knees. She crawled between us, sucking us both in turn, switching fast, her tongue sloppy and eager.
"Both of you," she begged, voice hoarse. "Fuck me together. Fill every hole."
We moved to the living room. I lay back on the couch and she climbed on, sinking her soaked cunt down my shaft. Grandpa got behind her, spit on her asshole, and forced his cock in. She screamed in pleasure as we double-stuffed her, stretching her wide.
"Harder, you bastards," she snarled, riding us both. "Fuck your wife and mother like the incest whore she is."
We did. Grandpa pounded her ass while I thrust up into her cunt, our cocks rubbing together inside her through that thin wall. She came again, shaking and cursing, then demanded we switch.
I took her ass next, slick and tight, while Grandpa fucked her face. She moaned around his dick, drooling, eyes watering as he held her head and skull-fucked her. The room stank of sex and sweat.
We flipped her onto her back. I slammed back into her pussy while Grandpa fed her his cock again. She spread her legs wide, heels digging into my ass, begging for cum.
"Fill me up," she ordered. "Both of you. Breed this family slut."
Grandpa came first, shooting thick ropes down her throat. She swallowed every drop, then pulled me close. "Your turn, son. Cum in Mommy's cunt."
I exploded inside her, pumping load after load deep while she milked me dry. We collapsed in a sweaty heap, her holes leaking, all of us breathing hard.
She smiled, cum on her lips and thighs.

"Round two in ten minutes. Don't keep me waiting."