Unclear on the timeline because my family are not interested in talking about it at length (only that my grandmother (72f) needs our support), but I believe they found out a couple years after I was born.
I was told this last year by my father (50m) last year because I was finally “old enough” and I don’t think they can cover how much he was away from home anymore. My grandmother did not seek a divorce for the sake of the kids and the grandkids (hate that this is the reason). And now everyone is expecting me to act normal and not mention anything, especially since I am the only grandkid who knows (my cousins are all more than five years younger than me).
I have never met the other wife or my half-uncle, but it’s very difficult to be in the same room with my grandfather without breaking down, because I’m just so mad about what he did to my grandmother. I am thankful that I live 8000 miles away and only see him once a year.