My 5 yr old boy has been diagnosed with ADHD, and PDD. I have no idea if these diagnoseses are correct, but my son seems to be sadistic. Every minute of every day, he is so mean to me and his sister. His baby sister and i have to lock ourselves in a room at times because he is spitting and kicking. He thinks it is funny to hurt us. This isn't new. He has been this way since he learned how to talk. He is very emotionally disturbed, i know. But this behavior only is with me and others he lives with. i have tried to sit with him and give him more and more attention. he, out of the blue, kicks his baby sister in the head and laughs. he has a therapist, a docter, and med reviews. He is on resperdal, which doesn't make it any better. He has tried other meds that make it worst, or don't work. His psychologist says he has anger issues with me. I don't know why. these behaviors aren't "when he is mad". they come out of nowhere. i am scared of him. today, he thought he would wake me up by sitting on a pillow on top of my face. I don't let him watch scary movies, I am a stay at home mom. is he truely sadistic? He says he is going to pee on me. He won't go to his rm when i tell him time-out time. We used PECS pictures because of verbal delays. But i seem to think he is just thinking it is fun to be meant to us, no matter what. Please, help. He is too young to go into a hospital for treatment, but he is a danger to himself and others.