She's 9 and can be the sweetest thing but then whiney, very cheeky - answers back, has frequent major tantrums at the slightest thing. . The list goes on. She can't be reasoned with - she just blocks you. She's always been like this. School is fine - no issues there except for the fact that she really struggles with maths and English and is behind her peers with that. Her sister 10 yrs is completely the opposite and is a high flyer at school. The problem is, I'm trying to help her but I'm constantly on egg shells with DH about it. He just can't cope with her and we end up falling out and he sulks at me and the girls. Typical example, yesterday she had a fall out with dd1 whilst we were out (we're on holiday). During her stomp, she waked past dh and gave him her sulky look. This set him off and basically, it's been hell since (he's shut himself off). I'm at my wits end. I sometimes (often) wonder if I should take the girls and leave. In truth, it's been going on for years. I thought things might get better in time but they haven't. I don't know how to go about leaving or what effect this would have on them.