We are having some trouble with our 12 year old son. I can see how things have progressed and how we haven't quite followed the Rosemond plan. He is very rude with his sisters, he talks back a lot and this is when things escalate. He gets upset when things aren't to his liking. For example, if they are doing something in school he finds boring, he gets really flippant toward the teacher, or when we tell him something he doesn't like. If it I were to focus on one problem it would be handling adversity or bad news or situation he doesn't like. The biggest problem is talking back after the initial reprimand. It has escalated and we don't know how to reel it back in. He has spent days in his room. When he goes to his room he slams things and yells. So, how do we stop the backtalking and deescalate things back to a normal level?