ds1 went through a horrible aggressive stage til he was about 3. Would still get rough here and there, but much better. Whilst he was going through this it almost felt like he enjoyed making them upset, especially younger ones. Anyway, he started reception in sept. We went on a playdate today where he twice hurt his friends 2 year old sister. First time he hit her because she kept shouting. I did hear him ask her to stop first, but i made him apologise and explained you dont hit and to move away next time. Then towards the end he was pretending to be lions with her in other room, next thing you know shes really crying. He was tickling her then he bit her bum. I feel like he cant be left alone with a younger child. I felt so isolated and alone going through this last time. It just makes me so depressed, its like he enjoys hurting. Please help me?