Is AUTHOR wrong in the post ? POST : On mobile,sorry for the format and there will be a TL;DR.

So today I finally brought up the subject to my mother that I wanted my father to sit with his wife during my wedding. He and my mother have been divorced almost 20 years and he remarried back in 2004, she remarried 2 years ago but my stepfather passed due to liver failure. She flipped her shit and got professionally offended,saying she wasnt going to share the church pew row with her,she didnt raise me,and I had some audacity to ask her that,as well as treating her like shit. My stepmother has done nothing but treat my father, myself and my brother amazingly. My mom refuses to meet her because she still holds on to the past and constantly spits poison about her and my father. 

My mother made him leave due to constant infidelity,him in general not being around, and religious differences which they couldn't agree on where my brother and I would go to church.

My father did continue with his terrible lifestyle up until the point he had a serious medical issue that almost killed him and from there he turned his life around,getting clean,making time for my brother and I, trying to be apart of our lives, and sticking to his religious beliefs.

For context of our relationship my mother, post divorce for roughly 6 years, would take her anger and frustrations out on me because Iook just like my father and I had given up on myself at school due to constant harassment. Which in turn would cause a vicious cycle, crap beat out of me at school, being put down,wouldnt do my work,bad grades,mom saw grades,beating with a belt. Then her and dad would get into something trivial and she would treat me like crap on top of that,not making me dinner, took everything out but clothes,sheet and a pillow in my room. Would leave me at work with no ride back and would deny my brother coming to get me. Would also try to control every aspect of my life, such as work,extracurricular activities, etc. Which she had managed to do with my brother.

Needless to say once I could drive myself I made myself scarce and she still tried to control me. What caused me to eventually leave was a fight over the car I had bought with my money. After I had left I would live with friends and bounce around town until I managed to get a decent enough job to live on my own a few years back. Back in 2012 she had finally realized how bad she was treating everyone around her and finally got help but it seems over the past few years shes been regressing.

I feel like the day should be about my fiance and I and celebrating our love. As well as everyone enjoying the day and putting personal feelings aside to celebrate with us, at least being civil with each other. Was I an asshole for my request?

TL;DR:
Told my mother I wanted my stepmother to sit with my dad during my wedding,bad divorce between parents,moms a control freak,flipped her shit over the request. AITA?

