I currently do not have a relationship with my mother, my choice (always had a difficult relationship - 3 years ago realised that I can step away to protect myself.)
The silver lining is that my relationship with my dad has gotten better - I was not close to him growing up.
When I have children, I would want him involved in their lives (to whatever extent he wants to be involved), but not my mother. This is because she is prone to rejecting people/ cutting them out / pushing them away if they do something that she takes as a personal attack or wrong - reasons I believe the general population would find unreasonable. I don't want my children to develop a "good" relationship with her, ultimately to be rejected like I have (and I'm not the only one!)
Is it even possible for my children to have a relationship with my dad? How would you explain if they ask why they never see their grandma, or why they never go to grandad's house?