I am of the view that a good humilation for a woman is for her to be compelled to suck and fuck boys/men who are significantly younger than the woman is. It would underline her new enforced slut lifestyle. It can be a guy taking revenge on a teacher for her giving him a failing grade (thereby losing a sports scholarship), it could be a teenage boy whose mom has imposed unreasonable---to him---curfew/dating rules. The male can then force his new slave to approach one or more males, and in full view of witnesses, offer "willingly" (yeah, right!) blowjobs and/or fucks. Additionally, she can be sexually ambushed and publically fucked in a campus or office hallway for example. In any case an effective way to force the bitch to do as told by her master would be tit-torture (say vise and voltage). No mutilation or lasting scars---after all the guy wants her to still be attractive.