Mom issues

So I'll start by saying I love my mom and am happy she loves our kids that being said I have no idea how to communicate to her that this is our last baby and id really like for it to be just me and my husband in the delivery room I don't mind her coming after the birth its just that she has been to every one of my births because despite me telling her as nicely as possible that I don't feel comfortable and would rather she come after she would start crying and saying I'm mean and that she has seen me give birth before and im just being selfish and then calling my grandparents and crying to them that I'm being cruel I finally gave up and she gets her way I'm so exausted trying to get her to understand its awkward for me and I dont like it I really dont want everyone to be staring at my vagina ( I know they are watching the baby be born but still for me a very private thing) I guess I'm just venting this is out last baby and the first time in actually fighting to have the birth I want im really not trying to be mean or selfish but shouldnt it matter how I feel?