DS does a little bit of thing kind of thing. Can be a bit manipulative and plays it against DH and me as DH is a lot harder then I am. By which I mean that DH gets angrier - I don't think I give in more. I do think that when he is like that the more we push him and get angry the more he rebels because he likes to feel he has a certain amount of control over his own life. So the more rules we inflict the worse it gets. Some rules need to be there (e.g. hurting people or damaging property) but I wonder if she is sort of feeling the same. She has moved away from what she knows and is living in someone elses house with their own rules and maybe she feels like she has no control over her own life. I can't think of a solution off the top of my head but if my suggestions feel logical to you then maybe you can think of something. She may seem young to worry about things like this but research on animals (sorry but my field) show that animals which have more control over their environment generally have better welfare (I probably sound very random now!).