What is the name of your state? New Hampshire.... How old does my stepson have to be before he can stay here...He lives in Missouri and he told his father before school got out that he wanted to live with us..My husband has him for the summer...He is 14 1/2 he told his teachers and his guidance counslor that he was coming to live here..He has it rough out in mo. We pay support for him and is 2 older brothers but it looks like they live very poor...Can he just stay here or do we have to take him back..He says he is not going back..