MIL flipped out, longish rant.

Let me start off by saying if you have a great relationship with your MIL I'm happy for you! Not everyone does, & in my case even my hubby, her own son has never really had a good relationship with her because she's very passive-aggressive, loves drama, plays the victim constantly & is also an alcoholic. Anyway, when I first found out I was preggo with our rainbow baby she said she wanted to be in the delivery room. I said no that I wasn't comfortable with it, mind you this isn't her first grandchild & she had just seen her own daughter my (SIL) give birth a few months prior. I only want hubby & my mom there, She kinda brushed it off. So now being due in 17 days give or take, I told hubby we have to bring up the topic once again because just knowing how she is if he were to tell her, his sister or his dad I was in labor she'd probably just show up uninvited to the hospital & expect us not to send her off. Hubby is supportive with how I feel and he knows how crazy she acted in the delivery room with his sister and he understands why I don't want her there. But that's not all, I have a 7yo daughter from a previous relationship so after I actually deliver our son I wanted my mom to leave and go pick up my daughter so she can be the first one to meet her baby brother. I mean this is a big thing for her and I want her to feel as involve & special as she can being able to bond with her sibling before everyone shows up to start passing him around. So hubby explains this to his parents and said we will call you guys after we have that family bonding time & then you can come whenever you'd like. (& seriously it just would be a few hours anyway!) Well she flipped out cussing at hubby saying "get the fuck out" & a lot of other mean things (we were at their house visiting) I'm not sure if anyone thinks this is selfish of me but it's made me feel really upset. I know this is just the beginning of more yet to come even after he's here because she calls my baby "her baby" and that I have to drop him off with her all the time & leave them alone. Like what!? I don't really want my son around her that much because of how she is & it makes me sad that everything has always got to be so much drama & it's like no matter what I say or do she always blows it out of proportion. Idk why it's stressing me out so much! Anyone else with these types of issues with their MIL? Idk how to stop worrying about it.