Beliefs in model

Hi Brooke- I learned so much in March about my beliefs. I’m wondering what you think about adding a belief line in the model since our beliefs are the underlying paradigm creator causing our thoughts. Maybe this is too much when one is just starting out but I find that it helps me so much I’m figuring things out.
Circumstance: I call my mom each day for three days. She does not call me back.
Feeling- anger
Thoughts – My Mom should care more about my life and call me.
Belief: mom’s should be involved in their adult kids’ lives
Action: aloof from Mom
Result: tension and non closeness

I’m going to get live coaching from you about my mom but I’m just wondering why there isn’t a belief line in the model and whether or not it would be helpful to add it?