Convincing Step-Sister To Cheat

Description: your step-sister is on the phone to her boyfriend when you creep into her room, he's cheated again like so many times, and she is forgiving him once again. she looks sad, so you try and cheer her up. you tell her it's not fair how he has fucked other girls, and she stays loyal to him. he should know how it feels, your step-sister should cheat! she thinks about it for a moment, but who would she cheat with? she has stopped talking to her male friends because her boyfriend made her. you are the only man she talks to, and what is she going to do, cheat with you? that would be so fucked up right... right?