I agree with Tash about documenting everything; it could serve a double purpose for her. Firstly it's going to help in her legal battle, but she could also use it symbolically. So, her daughter gets home sunburnt and in the same clothes she left in - your friend writes it all in the book and views it as wiping her mind clean. The book takes it out of her head, so it can't be dwelt on anymore; a physical act of separation.

Or do I need some more/less meds?