Some background context to start with. My parents are divorced. I'm 17. My younger sister died 11 years ago which was a part of why my parents divorced. They shared custody of me after the divorce and my dad remarried and had a daughter with his wife last year. They had to get a lot of fertility treatments to have her and she was their last chance for that. There are no more options for them to have bio kids.

Right after my half sister died my dad told mom he was going to bury her with my sister. Mom said no. Dad was like don't try to stop this, you would be a monster to do that and mom said she was not letting his daughter get buried with hers. They fought about it and dad tried to get me to fight mom about this on his behalf. I refused and he didn't let up so I stopped going to his house. It's been 10 days and from what I know dad and his wife are still in limbo and my half sister hasn't had her funeral yet.

My dad's blaming mom for me abandoning him in his grief. I've told him it was his actions that made me stop going. He said it's not like I care anyway and I haven't cried once or acted like I care where she goes either way. Then he said I owed him more than this. How he's always been a good dad and he's suffering and his second marriage might fall apart and he doesn't have his only living kid there. I didn't respond to that and I stopped the call so he texted me like 50 times that night asking how I could abandon him and stuff.

Pulling away has felt right to me. I don't really want to be put in the middle by dad and things between him and his wife are weird right now so it means I'm avoiding that too. But maybe I'm selfish. AITA?