Thanks for all the advice everyone. Although I am still torn on what I should do, for now I'm not going to tell the branch president or anyone else. Like most of you said, this is her decision to make and I do not want to break her trust by telling someone else. She's already been betrayed once by someone and I wouldn't want to do that again (although it is under extremely different circumstances) I will definitely encourage her to go to the police, although I'm not sure if it will be too late to find any evidence? I will also encourage her to seek counseling as well. Most of all, I will be there to support her. I will offer a priesthood blessing and anything else I can help with. Again, thanks for all the advice and help