I'm looking for some advice with regards to my nephew who is 5 and is autistic and pre-verbal. His mum has agreed that I should post and ask for advice. He has recently started reception and has a 1-to-1 and he is doing really well there. The problem is at home he can be very aggressive, sometimes to his mum but not usually. They live with our mum and stepdad (his nan and grandad) both aren't in very good health, my mum just went into remission from cancer and my stepdad just had a leg amputated and went into a wheelchair a few weeks ago. My nephew frequently pulls their hard very hard (often coming away with clumps of hair) hits them and pushes my DSDs wheelchair around, scaring him. If I ever go around with my children (7, 6 and 2) it is even worse. I can't leave him alone with my 2 year old for a second, he constantly attacks him pulling his hair out, pushing him or grabbing his arm and pulling him around- not in a playful way but a harmful way. He will do this even when I am standing right next to them. He is extremely close with my 6 year old and adores her but he will pull her hair as well, and my 7yo too. He definitely isn't doing this out of frustration or anger- he seems to find it funny and laughs. He will hurt them whilst looking at the closest adult to see what will happen. He will be playing happily with them one second and hurting them the next. He seems to be pleased when he gets told off. We have tried telling him off, time outs and also heavily praising him when he is being good. This has been going on for months now and nothing is helping. I can't bring my kids to my mums house at all because he constantly hurts them, he will be separated for cooling down time and the second he is finished he will make a beeline for a child or adult and hurt them again. Nothing seems to be working and it is really tearing our family apart. We all just want to support him as best as we can. My stepdad is considering leaving the family home because he can't protect himself from being hurt all of the time. I should add that my nephew is larger then the average 5 year old and very strong- it really does hurt when he does these things. There just doesn't seem to be any support for my sister to deal with this, and it is heartbreaking for me not to be able to spend time with my nephew who I really love dearly because I am scared of his behaviour. Has anybody got any advice on how we can move forward? Please be kind as none of us are experts and we are trying our best