Is this a common thing among difficult children? He seems to be doing better with the way he treats me, although that has it's ups and downs, but he is constantly so mean, nasty, and aggressive towards easy child. The therapist has tried to work on this with him until he was blue in the face. We just always seem to backtrack to "I'm the older brother, he has to do what I say, when I say it and if he doesn't I'm going to yell, scream and pitch a fit until easy child gives in and gives me what I want." Obviously, summer vacation, when they are together all of the time, does not make things easier. At least easy child is doing a couple of week long sports camps at various times during the summer so he will be out of the house for almost the whole day.