Help please! SIL is causing huge problems, she is I think unstable but refuses to get help even though we have all spoken to her friendly and kindly as much as you can to offer any help. She regularly storms out of her home and throws DB's things on the floor and takes all photos of them off the walls, she refuses to speak to me, dh, ds and dd and dp's when she's in a mood. This is because she hasn't got her own way over something. Our whole family bends over backwards to help her - we regularly change our plans to dogsit for her when she's working and seriously never get a thank you from her, db has also had enough as she's so rude to him but he's loyal and doesn't know what to do. She has threatened him, hit him, sworn at him and sent him vile texts while she's in these moods. Then suddenly she's all ok again and expecting everyone to come to her beck and call. She goes into such black moods there is nothing anyone can do to bring her out of this. Any helpful suggestions welcomed.