Need delivery room/grandma advice!!

 

Background: My mother is a heavy drinker, rude, judgmental, and was a distant, cold mother growing up. She has severe depression which meant that she spent most of her time sleeping instead of bonding with me. She's said several cruel and mean things to me growing up & I don't really try to have a relationship with her. We aren't close whatsoever yet she always expects me to go out of my way to make sure she's included and happy -- and God forbid I actually spend more time with the one woman who has been there for me since I was 16, my step mother-in-law. My husband's mom lives in Florida and doesn't really ever contact us or her son very often, but I heard through the grapevine she wants to come stay with us. We hadn't seen her in a couple of years until my husband's half brother passed away, but it would've been much longer had that not happen. The idea of her staying in our house with us seems super awkward especially considering how she never makes time for her son {and left him when he was 5 years old after getting knocked up by the neighbor}.