What would you do?

My Mother In Law wants to watch my soon to be year old son while I go into labor. I’m having a c section an will be there a good 2 days or so my doctor told me. But I do not want her watching him. Not only do her and I not see eye to eye we have butted head multiple times. She’s a pill popper an doesn’t know how to take her pills as prescribed an falls a lot. It scares me to think something could happen cause she falls all the time at her house and what if she is holding him. Plus she doesn’t follow our simple rules for our son. She gives him soda and pure juice when he can’t have them do to when he was born an next month they can do more tests to rule things out. She’s already made him sick by giving him something he wasn’t supposed to and had to go to the hospital and cps almost got involved. But also I want whoever to watch him to stay at our house cause of him not sleeping anywhere other then his bed. And she’s a heavy sleeper and wants him in her bed he’s not a co sleeper baby and when he’s in a bed he wants to get off and crawl everywhere. I don’t want him falling off their bed. An when she’s at our house she goes through my personal belongings and takes my stuff. I just don’t want that and I want my mom to watch him and to stay at our house while we’re at the hospital. But my MIL is making a big stink and she always puts me down and talks about me not being a proper wife and it must be nice to be a lower class being a upper class citizen since being apart of her family. And she talks to my son telling him things like that about me. I don’t like it or appreciate it and I’ve spoken my mind and she doesn’t care. My husband says it’s her meds blah blah blah but it still bothers me on how she is and I fear if she doesn’t properly follow whatever or watch him something will happen. I’m to the point if my husband an I can’t agree on something I don’t even want him there for the delivery of our baby. Cause of how things are going. An what else makes me mad is she never comes to see her grandson my child because she has 3 grandsons now but now that I’m currently pregnant with the first granddaughter she suddenly wants to come around. I don’t think it’s fair not only to my son but the other two grandsons as well. My son gets it worse then the other two also for each holiday since he’s been born she refuses to get him anything but the other two get whatever. I’m to the point i don’t even want to be with my husband either cause he doesn’t stock up for me or our son he lets her say or do whatever to us.