How about this for a script idea? For Rachel or any of the other models.
"Sisters Cruel Secret"
Sister is all dressed up all sexy for a night out. Short skirt, high heels, low cut top, lots of make-up etc. Brother asks her where she is going but she goes all coy at first and doesnt want to tell him. He keeps on at her so she finally gives in. She says she is going to have a threesome. Brother asks who with but she says he really doesnt want to know.
Again, brother keeps on at her so she gives in and tells him that the threesome is with his girlfriend and Lee the bouncer at the pub who brother hates. Sister laughs at how brothers expression has changed, she asks him if he is going to cry! She starts to taunt him how his girlfriend has told her that he has a small cock and cannot satisfy her so she has to get cock elsewhere. She tells brother to get his cock out so she can have a laugh at how small it is. He takes it out and sis laughs and starts to flash her tits and pussy at him to make it hard. She tells him to jerk it as she verbally humiliates him some more.
She tells him how his girlfriend has fucked loads of men behind his back and they all have bigger cocks than him. She tells him that Her and his GF might bring him with them and tie him up and make him watch Lee fuck them both. She says "How humiliating would that be, watching a real man fuck your girlfriend and your sister."
Sis humiliates him further as he jerks by suggestiong that he could be her and his girlfriends cuckold boy, helping them get ready for hot dates with real men and watching them get fucked. She teases him that he cant satisfy his own GF but she can and she cant wait to make him watch her lick out his GF and make her cum!
