My DS (4.5) is fairly well behaved at home most of the time. I have recently been told by his key worker, that he is quite naughty while he is with them,and they are 'monitoring' his behaviour.
He keeps telling me that his friend 'E' is naughty and tells him to do naughty things as well, for example they both pulled part of the play house roof off last week and this week were running people over with their bikes on purpose. He also tells me that 'E' doesn't let him do painting or art activities as he 'doesn't like' them. When he was off sick DS bought home alot of art things I have recently been told 'Mummy E said f**ker today'. 
Am going to suggest that DS is 'focused' more and kept away from 'E', when we go in tomorrow to discuss this behaviour. Do you think this is resonable or am I being overprotective? I understand I can't keep him wrapped in cotton wool for ever!
Advice please.
Sorry for essay!