If in doubt ask her if she knows about BDSM. As for what you have said about what you believe that the man in her life is putting her out on her back. (trying to be nice here) Again ask it is a risk and it my loss you a friend, and the worst is she will be subjecting herself to the life she is already in but, if I read it right what you are saying than this person sound like someone in need of help. If you see someone drowning you try to save them, but you can't always save everyone. All that can be asked is that you try. Good luck. And please keep me informed. I'll try to help if I can.