The silver lining of the nc with mom has been the new and supportive relationship with my Dad.
He paid child support, saw us when he was permitted, and was certainly loving in his way, but he has maintained an aloofness in his role as a Father for many years after we all reached adulthood. (No doubt some of this happened as result of a super strict custody agreement that I believe resulted in "friendly feelings" toward him, but not a strong stereotypical Father/Daughter bond.
That being said, he has really surprised me and has stepped into the role of proud grandpa and been there for me (my stepmom as well) in this season of change. I would classify his role in my life as a supporter, but I find it is still tricky.
I am concerned there is some well meaning triangulation?
I put the boundary in place that I won't talk to my siblings about my mom. Dad knows this and he doesn't go there with them, but occasionally when Dad is communicating to them about holidays or how they are doing... I am getting things told back to me that I didn't ask.
For example, I recently told my oldest brother that I wouldn't discuss my nc decision any further with him. We haven't communicated since.
My Dad invited my bro to family christmas and my brother said well I haven't decided if I can go because "Imatter" (me) will be there." My Dad apparently took it upon himself to stand up for me and defend my nc.

? I then find out that my brother thought that I explained myself well (in our last message) but he still doesn't know if wants to come to xmas.

I like having my dad hear me out sometimes. I feel he is far enough removed from my Mom where he can actually help me process?
My relationship with my sister has been sort of strained as well, but we stick to certain topics and facebook banter for the most part. But her and my Dad work together!
I know my Dad kind of feels that he is trying to help all of his kids, and support me but I am nervous. The feedback I get from Dad about my siblings (has been kind of nice) bc now topics about family and emotions are limited.
Is there a difference evident between triangulation and the relaying of conversation?