The Little Sister. The actual person, not the Raymond Chandler novel.

You slip out and find what--or rather who--is making the noise. Stacy, clad in a conservative nightshirt, stands there. She gawks in horror as soon as you come into view, and then tries to make a break for it, but much too late. You are on her in an instant, grabbing her. You quickly pull her into her mother's bedroom. Stacy stares with horror and fascination at the defilement of her mother going on within.

"Well, look what I found hanging outside," you say with a chuckle. Mick and Derek both laugh.

"Well done, my man," says Mick, giving you a thumbs' up.

Derek grins at you. "Mmmmm, glad to see you've got the bitch." Stacy shivers at her brother's words. "Yeah, that's right, Stacy. You watch this. It's gonna happen to you soon." He glances at Mick. "Hey, let Mom tell Stacy about this."

Mick nods and pull his cock out of the woman's mouth. She groans plaintively and reaches out for the massive member. "Nooo," she groans. "Give it back. Want cock. Need it! Fuck me! FUCK ME!" She turns to stare at her son. "Come on, Derek, fuck your mother's cunt with that amazing demon DICK! MAKE ME SCREAM, YOU FUCKING EVIL STUD! AHHHHHH!"

Derek chuckles at that. "Mmmm, you're turning into an amazing slut, mom. " He leans forward and licks on one of his mother's breasts with his serpentine tongue. "You deserve a real treat." He turns to you. "Try and restrain my little sister. I want you to help fuck mom."

You nod, and open the closet. You find a bedrobe with a firm silk tie, and pull it out, then tie Stacy's arms to the door. She whimpers and screams as you do so. Derek laughs, then flips over on the bed so he his on his back, carrying his mother with him. She rides his cock, screaming in ecstasy, while Derek frames her jiggling ass with his hands and spreads her cheeks open. Taking his hint, you stride forward and shove your dick up the woman's tight asshole, causing to shriek in delight.

"Oh, that's it, that it studs, fuck my holes, treat me like the skanky whore I am and stuff me with your giant cocks!" she shouts.

Mick laughs and grabs her head. "This bitch needs to shut her mouth again," he says, slapping her face with his dick.

"Ooooh, feed me that hard thing," snarls Derek's mother, groaning in pleasure as Mick's cock slips in her mouth. Soon the three of you are eagerly fucking the woman in all her holes, while Stacy watches her mother's defilement in horror and growing, terrible arousal.