Mostly posting in AIBU for traffic, but would be great to hear what other people would do in this situation.
I'll try to make the back story as brief as possible, whilst giving all relevant info.
My bio father walked out when I was 18m. Did not maintain contact, no child maintenance. Started a relationship with another woman and then got married and had two more kids.
At my end, my mum met my dad very shortly after. They married quickly and he raised me as his own. Even though they divorced when I was six, he has been a constant presence in my life. He was and is a loving, devoted dad and I couldn't ask for better.
As an adult, the daughter of my bio dad reached out to me and we met on our own terms. We got on like a house on fire and have maintained a relationship for the last seven or so years. We are in touch often and see each other ever time we're in the same city (maybe five or six times a year).
I met my bio dad once at age 10, then not again until I was 30. I don't really feel much needed to keep him on my life, I've moved on entirely. However at the wedding of my half sister we were both there and he was very emotional. He apologised and said how much he regrets waking away and not being part of my life, and he'd like to see me if I'd allow.
I thought he was drunk and didn't think much more of it. However he's got in touch and asked if I'd go for coffee when he's in my city next month.
I don't know what to do. I don't feel the need to see him for my sake, and don't think I'd get anything from it especially. However if he genuinely does carry a lot of regret and sadness, it wouldn't take a lot for me to alleviate that and have a coffee with him once a year.
My mum and dad would probably prefer I didn't see him. They don't think he has the right to waltz back in. However I will continue to see his daughter / my half sister and there will inevitably be cross over events. It would make these easier if I said yes.
AIBU to go, knowing that I'm only doing it to make these events easier and I have no real emotional investment in it?