I (27f) am getting married in October.Invitations went out and my dad called telling me I forgot to put my step mom's name on there invitation.The thing is I didn't forget.My step mom hated me from the start refusing to acknowledge me talking over me and other rude crap.but when she found out she was infertile a light flipped.all of a sudden instead of 50/50 custody my dad wanted 100%.I obviously refused.then she begged me to change my name to her dream baby name.but I couldn't forget her saying I was a fat who're because I had my shoulders out.I cut contact with my dad in college after he said he hoped my mom died so I would crawl back.we reconnected when I was 24 after he got therapy.But he would not give up about my step mom's loving me.so I told him she was not invited.He was livid' calling me a jerk and a classic brat insisting I needed therapy and that he would not come unless she came.I hung up.My step mom won't stop calling me and posting sob stories on social media.I am sick of this and don't understand why he won't just come to the ceremony. So AITAH