Social Services are falling down on the job. Surely they should have been checking out where she is going to live and with whom? For instance where is she sleeping, a 13 year old girl should have her own room. A 13 year old needs supervision and boundaries set, all teenagers are untidy it is in their job description she will need firm but kind handling. It seems she has been dumped because her brother finds it inconvenient now he is married, in my opinion his first duty is to his minor sibling and woman who is not willing to go along with that is seriously lacking in humanity, I wonder does she have her own children and/or jealously is an issue. Quite why he would want to marry this woman and possibly have kids with her beats me. This girl is now with someone who assumed joint legal guardianship with the brother but may be a comparative stranger to her now. She must feel very lonely and frightened for her future. I feel sorry for the child, but living in an atmosphere which I imagine you could cut with a knife is not good either. Think the friend should contact social services and Citizens Advice they may be able to find a local solicitor who will give a half hour consultation for nothing some do from time to time. It would be interesting to know the wording to the lease as some will not allow another party to move in unless they have been consulted and the other tenants agree. So check the lease, request a visit from Social Services to the home it may be worth recording any such visit but that should be done with the full knowledge of all participants, speak to Citizens' Advice.