AITA for not inviting my stepmom to my graduation?

So I, 18F, am graduating high school this May. For context, I've known her, 47F, since I was 3 but never got close to her. There's been several events that I've encountered with her that makes me not want her to celebrate this achievement with me. Recently I found out how many graduation tickets I'm getting, and I didn't invite my stepmom. My dad, 47M, found out about this arrangement and got mad about it. He practically yelled at me saying she is the mother that raised me, and she deserves a place at my graduation just as much as he does. He told me if she doesn't get a ticket she can't go. I'm torn because I want my dad there with me, but i don't want her there to celebrate with me. so, AITA

If you guys want, I can give y'all a list of things that's happened.