u said u want to help her, but do u honestly think that by telling the police about her visa status would solve her problem? are u fully aware of the consequences. if the only intention is to help, there are hundred and one solutions but if there is a different intention which u can not even admit to urself, then, wake up, today it's her, but later on, u might be in a similar situation...talk to her, explain things to her and make her understand that for every action she does, there is a consequence...that i think is helping.