FIrst off, welcome to the forum. And to answer your question, yes, this is sexual touching without consent, which is sexual abuse. It is most disturbing to hear this. I would honestly not even consider talking to him about this. It is wrong on so many levels. You are not awake, and he is touching you until orgasm? He is forcing himself on you, because you resist his sexual aggression. This is sexually aggressive behavior. I would divorce him and not think TWICE about it. Your instinct is 100% correct. It isn't right.