Difficult (grand)mom, & more difficult (great) great aunt...

My mom is letting my great aunt visit the US while baby is due. I’m so so peeved. My aunt is like 90 years old, can walk around on her own, but at a slower than slow snail’s pace, is needy, though she claims she’s not, and last time she visited for 6+ weeks she drove my parents, especially my mom, insane. She can be a bit mean and last time my mom basically had to babysit her. My mom even complained about how she was hurting her work!

But now, (grand)mom thinks it’s okay for my great aunt to visit for two months around WHEN BABY IS DUE. 1 mo before and 1 mo after, even though we told her not to come at that time. My fam lives out of state so if they want to visit when I’m giving birth at the hospital/the following days, they’d have to stay at my apt. I already had to convince my hubby to let my parents and sister stay (he wants our own special time getting to know baby without interruptions), and now he definitely doesn’t want my aunt visiting. I don’t want her visiting. And we have no space for it. I’d then have my mom plus aunt telling me what to do. And my aunt basically needs to be babysat herself. So her being here will only stress out me, my mom, and everyone.

I’m having an epic battle w my mom bc she thinks I don’t care about the family by telling her No to my great aunt. Especially bc I’m telling them if my aunt comes they have to stay at a hotel (which I think my rich old aunt should pay for but she won’t). My aunt can also be manipulative and I think she’s manipulating my mom as she’s said she wants to travel to the US for the summer bc she didn’t want to be w her friends back home. Ugh!

Also now that aunt bought her stupid plane tickets, she’s coming to the baby shower. My mom told me I can’t invite my cousins “bc they’ll start drama with my aunt,” even though my aunt is the one that starts all the drama. I know she’s family and older but I think she can come any other time, just please not when I’m trying to figure out how to be a first time mom!

Advice ladies! Please!!! How do I convince my mom that she needs to change my aunt’s plane tickets? or that they have to get a hotel? Or how would you manage the baby shower situation?