I am so sorry for you to have to go through that. I have a similar situation with my mother don’t really know my birth father met him two or 3 times when I was 16. I tried to stay in contact but he ghosted me. My mother told me if I had my aunt or grandmother in my life she would not be in it. She makes everything about her and always there for my brother (different dad) but never for me as a kid it was hard no child should ever go through that