The basement smelled of leather, sweat, and wet fur. Mom was already naked on the padded bench, wrists cuffed behind her back, legs spread wide in the steel spreader bar. Her tits hung heavy, nipples clamped and red. Dad stood behind her, cock out, thick and veined, slapping it against her ass.
"Open that cunt for me, sis," he growled at me. I was nineteen, but in this house I was just another hole. I dropped to my knees, crawled between Mom's thighs, and shoved my tongue into her dripping slit. She moaned, pushing back against my face while Dad lined up and rammed into her asshole in one brutal thrust.
Mom screamed. Dad laughed, grabbed her hair, and started pounding. The wet slap of skin on skin filled the room. I kept licking, tasting his balls every time they swung forward, until he yanked me up by the hair and shoved his cock into my mouth straight from her ass.
"Suck it clean, little sister."
I gagged but took it. He fucked my throat hard until spit ran down my chin and onto my tits. Then he pulled out and whistled.
The dog came padding in, big, black, already hard. Its cock was red and slick, knot starting to swell. Dad unclipped Mom's spreader bar just enough to push her hips down. The dog mounted without hesitation, claws scraping the bench as it drove into her pussy. Mom howled, body jerking as the animal fucked her in fast, vicious strokes.
Dad turned to me. "Your turn next, but first you watch."
He made me kneel right beside the bench, face inches from where the dog's cock was stretching Mom open. I could smell the musk, see the knot battering her entrance. Mom came hard, shaking, drooling on the leather. The dog kept going until it locked inside her, pumping cum deep.
Dad dragged me onto the floor on all fours.
He didn't warm me up. He just spit on my asshole and shoved in, rough and deep, while the dog was still tied to Mom above us. Every thrust rocked me forward. He reached under and slapped my clit hard, over and over, until I was sobbing and coming around his cock.
When he pulled out he called the dog again. It was still leaking, but eager. Dad held my hips steady while the animal mounted me from behind. The first thrust missed, then found my cunt. It was hotter, faster, more savage than any man. I clawed the concrete as the dog fucked me like a bitch in heat, knot swelling fast, stretching me until I thought I'd tear.
Dad stroked himself while he watched. "That's it. Take that dog cock like the family slut you are."
The knot popped in. The dog locked, grinding, flooding me with thick, hot cum. I came so hard my vision went white. Dad stepped up, fed his cock into my mouth again, and used my throat while the dog stayed buried in my cunt.
Mom crawled over, still leaking, and licked where the dog's knot stretched me. Dad came down my throat, pulled out, and painted my face. The dog finally slipped free with a wet rush of cum that Mom immediately started lapping up.
We didn't stop until the sun came up. By then Mom and I were both marked with bites, bruises, and cum, inside and out, from both the men and the dog. Dad locked the cuffs back on and left us there, sore, used, and already hungry for the next time.
