Toxic Mom

Hello all,
I’m having to make a big decision here as to whether I invite my mother to my wedding or not. She’s already flipped out on my fiancé threatening to not come because she assumed we were inviting my aunt and not her. She’s done this to me in the past and has embarrassed me numerous times, even as a child. I finally sent her and my aunt a message setting some boundaries if she or they both were to fly out here from Colombia. I was straightforward but let her know I loved her and hope she’d understand. I was clear she was still invited but that I needed to know she’d be on her best behavior. Unfortunately, she replied with all caps, saying I was egotistical and selfish and all this other negativity that I chose to not read. That did it for me. I do not want that toxicity at my wedding. I have a feeling she will reach out closer to the date apologizing and wanting to come. (She’s done this before). But I’m afraid at this point I don’t want her there for fear of how she’ll act when she sees my dad or someone else she doesn’t like, or perhaps because I’m not spending enough time with her after she flew all the way out here. The problem is I’m feeling guilt and I know my Colombian family will be disappointed that I won’t forgive her before the wedding, as they are very family oriented. Any advice or suggestions? Thank you in advance. ♥️