Nice! Actually, it would be a surprise for me if rape will be added since currently it have no gameplay meaning. You can't get pregnant or receive a statistic or your "sexual life" so rape wouldn't do a thing but humiliate you.
I see only one way it can be used in gameplay: a very strong enemy (boss) took most of your HP and you have a choice: die or watch a long scene (kill your time) to put boss into stun where you can either heal yourself or put final strikes. (In my opinion this is bullshit because you need to balance it a lot + it's a little cheaty)