Hi. So I am not a mummy but I am very close with my nieces, my middle niece who is 11 has Autism. She is a lovely girl most of the time and is very bright and knows the difference between right and wrong, but her attitude towards her mum (my sister) can be very nasty and she always does the total opposite and goes against absolutely everything we say to her and then becomes very difficult and argumentative and says some very hurtful things to her mum. She doesn't do this to anyone else and has a lot of friends and is very well liked by other adults and teachers and does very well at school. I was wondering if anyone else has these problems? Why does she do this to her mum? It has become very bad and when she refused to give her mum her phone the other day after being particularly nasty, I tried to take it from her and wrestled with her for it a bit and she hit me. We are at a loss as to what to do. Would appreciate any advice. Thank you.x