Hi Pythagoras, welcome to the group

I get why you chose your name

feeling a lot of triangles lately?
She’s also an only child, so… it’s just us three girls.
I don’t even know what else to say, just curious if anyone out there finds that relatable?
There are many members here who have adult children with BPD who have their own children, and are navigating that parent/grandparent dynamic. "Complicated and messy" will be very relatable. Relationships with pwBPD are often not straighforward and not simple, and when they manage access to grandchildren, it can be difficult.
How has grandparenting gone? Is your D pretty open to you spending time with your GD? Or is there conflict there?
And how does the drama triangle typically show up for you and your D?
Keep us in the loop with how you and your family are doing;
kells76