It's worth noting, though, that the bottom/submissive/“victim" in a scene is not the only one who can get hurt. Not only can tops develop "flogger's shoulder" or other repetitive strain injuries, they are just as vulnerable to psychological harm as the bottom, but without the built-in safety valve: Bottoms can cry and regress and call a safe word if things get too intense. So can you, but you'll have to break role to do it. If you try this and it's too much for either one of you, stop. (You'll need a safe word other than “stop!" or "no!" or this will never work.) It'll be fine. It's not like you'll accidentally actually rape her or anything. It's a game, and games end when you're done playing.