Grandma Shower - what in the actual hell??

My mother text me today and said her coworkers through her a "grandma shower" I'm seriously annoyed. I'd be okay with it if she were the one to be taking care of her while I'm at work or if she wasn't financially stable, but neither of those scenarios apply to her.

She has made me extremely uncomfortable my entire pregnancy, I feel as if she thinks my baby is hers. Recently discovering she has a pregnancy tracker app on her phone and she keeps track of my doctor appts and everything my OB has done. And calls my family when she disagrees with something, you know because technology has changed in 30 years and she's not a doctor. So she has my family mad at my OB because she's given wrong information and then she's had the audacity of asking me if she can take my child 6 hours away from me and my husband for a vacation at 2 weeks old... I've told her no 3 times and she throws temper tantrums about it and tells me we will discuss it later. There is nothing to discuss. She's honestly creeping me out and I don't want her alone with my child, my husband said it's like the Hand That Rocks The Cradle, but my mother. I won't let her in the delivery room and she got super mad about it, but this is exactly why.

Has anyone had family that's obsessive over your pregnancy/baby?