Yep the nurses will kick out unwanted people! If she starts acting a fool they wont put up with it and she might just get herself arrested. Sorry ur dealing with this good luck.
Tell the nurse they can make her leave the room, that's what I wuld do!!!
Tell the hospital she's not allowed in the room, at all, it's your choice if you want her there after birth, if you don't, they won't even let her in the waiting room. Tell the staff she is NOT allowed near the room, and you don't want to know if she shows up, so it doesn't add extra stress. She's not staying with you is she? In your house? Because that could cause a lot of drama when you come home. I don't blame you one bit hun, stand your ground!!