She wants to act like a slut, then she can *be* a slut

"On your knees, bitch!"

She drops to the floor with a thud. With all your anger, you're not sure you like her anymore. However, seeing her below you with her shirt hanging open, she's still really hot.

"Take off that shirt!" you command. She pulls it off quickly and hands it to you. You look over it, then toss it on the floor. "From now on wear sexier clothing. Tighter shirts and pants, plus much shorter skirts. And no more bras or panties, a slut like you should be ready to fuck all the time."

"A... slut?" Her eyes glaze over as she absorbs your instructions.

"Oh yeah, you're a huge slut. A foul mouthed whore who can't get enough. That's why I dumped you, because you were always begging me for sex and I got tired of it. That's how you remember it, right?"

"Oh... right." She stares forward silently, almost in a trance.

"That's why you went running to Leo. You're such a slut, you're horny pretty much all the time. You don't even like the guy, you just needed someone to fuck you."

Her hand drifts to her crotch. She starts pawing herself through her skirt, trying to relieve her new state of arousal.

You smile and continue. "He wasn't good enough, though, so you called me and asked me to come over so you could beg me to fuck you. Well, I'm here, so you can start begging now."

Her eyes clear up as your final instructions sink in. She clasps her hands together and looks up at you desperately from the floor, not noticing as a couple of her sorority sisters enter the common room.

"Please!" she begs. "I really need your big cock! In my mouth, up my pussy, where ever you want to put it, just give me some of that cock, please!"

The two girls gasp at their sorority sister's behavior. One of them, a tall brunette, looks intently at your ex-girlfriend kneeling half naked on the floor. The other, a really short girl with curly red hair, pulls out a cell phone and looks for someone to call and tell the news.

Possibilities flood your mind. You could have these girls join in the fun. Or, you could have them round up the rest of the house and get a nice audience for your ex's humiliation.