Hi Susan, I have a friend with a son who is 2 and aggressive, doing similar things. Especially to Matilda. We have gone over with Matilda a few times to hang out but also to help work on this behaviour. So they play and if he behaves inappropriately his mum disciplines him with time out & apologies. They have been working very hard on this behaviour for around a month now and are gaining huge results. The whole family went to a Triple P program dealing with aggression in toddlers to get help. HTH!