Have you tried talking to her about it? Try to make her realize that it's not good for her to stay in that relationship. If the guy has absolutely no respect for her or anything, then it's obvious he just wants her for sex. I deal with this problem a lot with people in my life, and if I were you, I would try to get her out of that relationship before it gets worse for her. Wouldn't want her getting seriously hurt or abused or anything.
