My mom passed away a few years ago, during that time, we discovered that my dad had been cheating on her with a girl my age. His whole family disowned him and cut contact with him except for me.
I (26F) guess that at that time, I wasn't ready to let go of both my parents at the same time, but over these last 5 years, I've been able to gradually let go to the point I only see him (them) twice or thrice a month–it's like I have no family left.
Don't get me wrong, I also blame the girl for what happened, but the responsibility toward my mom and me was my dad's, not her.
They eventually had my half-sister (4F) and from what I've heard and know, my dad and his wife are living paycheck to paycheck. They're on a budget and in a rental home since everyone in the family changed the will.