My child is in school with a child they used to be quite friendly with. However this child tends to hit, punch and strangle my child regularly. Ive asked for them to be kept apart. This child's mum had a habit of being pushy and basically playing people off against each other. Over the summer I decided to reduce contact. I have informed my ex of this. Ive found out this child is having a playdate with mine at my exes house. I knows its his time his rules but really