Unfair?

So my husband is going to be away for the birth of our first child (most likely). He's got a very important buisness deal that needs to be closed, it just came up suddenly and happens to correspond with my due date (he'll be traveling out of country for this). It sucks for us, but this is very important for his career.

My husband was supposed to be the only person in the delivery room with me besides the medical personnel. I do want some form of support, so my mum offered to come stay with me when my husband is gone and possibly for a little while afterwards depending on how we're handling the new baby. I've asked her to be in the delivery room with me which of course she said yes to. I'm very grateful to her for coming to help me out for this on such short notice (I'm due in a matter of weeks and my mum lives across the Atlantic).

Well my MIL now wants to be in the delivery room because it's her grandchild too. I'm not close to my MIL in any way. We have a lot of differneces and our relationship has always been precarious. I am not comfortable with her being in the room. Everyone keeps telling me she can stand by my head and doesn't have too see anything, but even if she stayed by my head (I honestly wouldn't trust her to stay put) I still am not comfortable with her being there. She's got too many opinions on the fact that I'm having a full medical team and no doula/midwife (it's just not my thing- I spoke to a few and just didn't like the idea at all). She'll have something negative to say about my baby being vaccinated for polio of course (she's anti-vax which is a huge issue for me as I don't really want anyone who is not up to date on their vaccines so that's another issue). And she'll be giving advice all throughout the process. And being totally honest I don't want advice from her at all. She may have had 7 kids, but she's never been a good mother (I sound mean, but I could write a book on all the things she's done and still does to hurt her kids).

I just don't want her in the room. My husband is already gone and while he has tried telling her no over the phone, she's still insisting I allow her in the room. My husband wants this to be as easy of an experience for me as possible and he knows his mother will only make it harder than necessary. But, people keep saying that if I'm having my mum then his mum should be allowed too. In my opinion, my MIL does not equate to.my mother- the woman who gave birth to me, raised me, helped me through so much. I'm comfortable with my mum and my mum is always on my side. Having her in the room is totally different to having my MIL. So I do plan on informing the hospital only to allow my mother in the room, but I was wondering what others think about this whole situation.