Do i Invite Narcissistic Grandmother?

Hello,

I'll try to keep this short. I love my grandmother, she basically helped raise me, I would like to have her at my wedding om the condition she behaves, but do I take that risk?

She is very religious, has dementia, and lives with my aunt. Every family event at some point ends up being about her, but I'm used to this and can minimize it.

Somewhere along the line she has decided I'm of the devil. This has upset my aunt so much that my aunt disowned me but not before calling me a slew of nasty insults. My grandmother is thoroughly convinced that I am terrible but says she loves me anyway. Weird but okay.

My parents hate my aunt and grandmother. There were many family events ruined by an argument with my grandmother and aunt. If my grandmother were to show up, she's not being seated near my parents. She's not the kind to always start an argument but she definitely digs the knife in regardless.

My POV is that my grandmother is my grandmother, she's my last living grandparent, and she did help raise me. She's been mostly nice to me at things like proms in the past. She behaved at a cousin's wedding a few years ago so maybe she'll behave at mine? Of course the cousin was of the same religion and I'm not so I'm not certain. She actively hates my parents as well.

However...if not being invited were to upset my grandmother and then she were to die angry at me, I dont know if I could live with that. Dramatic? Maybe. But I have a few regrets about loved ones that have died in the past and I don't want to add more. The aunt isn't invited so she's not relevant as long as she doesn't show up uninvited.

Thoughts on this mess?