Smashingly.

You hear the footsteps coming up the stairs. You arrange yourselves for an ambush, and wait. Soon the door creaks open, and the head of Jess's father peaks in. "Well, Jules, I'm not sure," he says, glancing around. "It might have just been a branch or..." He doesn't get to complete that thought, because Jess grabs and yanks him into the room, followed by Julian. She easily manhandles her father and uncle--two large, muscular men--forcing them to both kneel before her and shoving her leaking tits into her mouth.

"There you go, Daddy. Uncle Jules," she murmurs to them, as they suckle her tainted milk. She affectionately strokes their heads and glances at the rest of you. "Go down and take care of the rest of them. I've got these two handled."

You and your parents swiftly charge down below. Jess's brother Aaron and her cousin Dan try to block your way, but your mother easily takes them down. As she holds their heads to her breasts and forces them to guzzle her tainted black milk, you and your father herd the three women into the center of the room. Your father tears off Vivian's shirt to fondle her voluptuous tits, while you ram your demonic cock down Susan's throat. Jess's mom stares in horror as her niece and sister-in-law are violated. You feel she is being left out and thrust your tail into her mouth.

Your father, already fucking Vivian up the ass, notices your lewd act and cackles. "I think I need to see how much dick you can fit in those lips, Lucy." He twirls his tail around and forces it into her mouth alongside yours. The pair of you quickly work out an obscene rhythm, one pulling out as the other pushes in, while twining your tails against each other to increase the pleasurable sensations. Your climaxes come quickly, flooding the whores before you with your tainted jism.

Soon the Strain has overcome your victims' morals. Aaron and Dan are spitroasting your mother, staring at the succubus's obscene, jiggling curves as Aaron drives his cock up her pussy while Dan pounds her tonsils. The three women servicing you and your father have transformed from **** victims to horny bitches, now eagerly competing for the chance to take your demonic members down their throats, or up their tight pussies and asses. "Mmmmm," says Jess, as she slinks in, her naked father and uncle following her with straining erections. "Somebody's having fun."

"Oh fuck, Ben," says Julian, staring at the sight of his daughter licking her mother's tits while both take immense incubus cocks up their defiled cunts. Jess's mom straddles the pair, pushing them together, while taking you and your father's tails up her pussy and ass. Julian shakes his head. "This is so sick." You see their haunted expressions, and realize that Ben and Julian are watching not only the degradation of their wives, but of their sisters, and you laugh at the sheer wrongness of it all.

Jess takes her uncle by the hand, and sits him down on a couch, then crouches over him, waving her breasts in his face. Soon, as he licks and sucks her nipples, she impales herself on his dick, grunting as she energetically fucks him. She looks over her shoulder at her father, smiling. "Come on, daddy," she coos. "Put that thing of yours up my ass." Ben licks his lips and then rushes forward. He spreads his succubus daughter's ass cheeks, and soon has driven his engorged cock up her tight hole.

For a little while, the room is filled only with the sound of groans, grunts, and flesh slapping on flesh.