Rainbow,

I think you're doing a great job of understanding that your t changed her mind, rather than lying. It's good also that you are able to distinguish the thoughts and feelings of your "child" part versus how the "adult" part of you feels. While recognizing that the child part of you feels sad and angry and feels lied to, the adult part of you can kick in and help that child part to understand things in a more realistic way.

I personally think you are doing great in your therapy!