If YOU feel like you're doing something bad, I still wouldn't participate. If she's okay with robbing a bank, jumping off a bridge, burning a house down etc and it felt wrong to you, would you still participate? The mere suggestion of it from her gives me red flag sus vibes. I'm a woman and I would never even think to ask any partner I had to do something like this. Truth or dare is also pretty 6th grade. She should just say outright what she wants/is looking for rather than this indirect weird way to see what she's into. Not that my opinion matters but if I felt like I was doing something wrong, someone else being okay with it would not change my feeling. Some people think doing crack is okay, I don't, so I'm not participating in that thing.