Out of curiosity, why the decision to go for a sort of 'buy' the clothes from the girl, instead of just pure strip blackjack? Clothes off her if you win, clothes off you if she wins.
unfortunately, I don't have any way to force the player to take off a piece of clothing when losing, but let's hope that technology advances enough to be able to do something similar in the future or at least that they get electric shocks if they refuse XD