My daughters half brother is 7 years old and i have known him since he was 6 months old. Me and his father are no longer together but we have a good relation ship and i still see them both regularly. However his son is demonstrating behaviour since he was about one that is not 'normal'. I have said a few times as sensitively as i can that i think there might be something up but i get shot down in flames. I get told that i don't like him as much because he isn't mine etc but the truth is i find him very hard work because he is so unsociable but i still love him. Almost all of you on here are experienced teachers and/or have children of your own what do you think of the following? he never talked or made any sound until he was 4 and a half He was really hard to toilet train and still has frequent accidents and is not dry at night, ever. He is unsociable and much prefers his own company He becomes obsessed over certain things - at the moment it is a game on the playstation and trains He talks with no expression at all very monotone He does not get even very very basic humour and cant understand when others get upset. I was convinced he was deaf when he was very little but i forced the point and this was checked and hearing is fine. What do you lot think. Am i concerned over nothing and 'picking' on him or do i have genuine concerns?