If she already took off her bra, and then took off her panties to reverse the rape accusation, she has nothing left to take off to reverse that last action. She had no leverage to make him into a slave. Not only is the concept absurd, but the author isn't even sticking to it. If you just want to draw a sexy girl and a timid boy doing naughty things, just draw that. Don't make up some bullshit gimmick that you can't even adhere to consistently.