He tells you that you are a "good mother" when he needs to think of you that way, for his own comfort and security that the children are taken care of. He tells you that you are a psychotic bitch when he needs to think of you that way so he can appear blameless to himself. It's all about them and what they need to see and feel at that moment.
My N will say good stuff and bad stuff all the time about me and none of it really goes together or makes any sense. One thing I know for sure - how they feel about you, is only how they "need" to feel about you for their own sakes.