I was going to say the same thing Steve said. Not only can you not rescue her, she doesn't WANT to be rescued by you. It would probably just make her angry and resentful. Leave her be, this is the path she has chosen. All of the walking around will do her some good and give her perspective on life. The ONLY thing I might suggest is if S is in a bad situation at her place then consider moving for full custody of him.
