Mil doesn’t mean she wants to meet the baby in the car park.
She means she will be waiting in the car park to come and see the baby when you are ready. It’s fairly normal for family to pop in while you are in hospital to see the baby. And it’s actually better than them coming to house soon after you get home.
How long would you like them to wait before seeing the baby? You don’t want them coming to your mums house.
I also don’t get the issue with you going to then 2 weeks after you were rushed to hospital. What were you rushed in for?
To be honest, you sound like you are expecting too much. Mil isn’t wrong for texting your dp. And it’s I wouldn’t expect my partners sisters to come visit me because I was pregnant.
I can’t believe the only reason you moved home is so your mother can care for you 24/7. That expectation is, I think, is really over the top. Did you move home for just for that? Do you work? Do you do anything around the home to help your mother?
You are talking about losing it, but I think that’s because you have entirely unreasonable expectations of how family should treat a pregnant woman. All you are going to do is cause massive issues between you, your partner and his family. These people are your child’s family. And I can’t really see much that they are doing wrong.