I've lurked awhile, but this is my first post so go easy on me, please. I'm still developing my backbone.
My situation isn't what seems typical, on here. My MIL and I get along great. She doesn't boundary stomp, she's not PA. She really is a sweet woman. I do not have any issues with her.
I am 13 weeks pregnant with my first child - SO's second. MIL made a comment a couple of days ago that has been stuck in my mind. She told SO, "Maybe I'll actually get to see this one come into the world."
MIL has three total grandchildren - my DSD and SIL's son and daughter. She was not able to be present at any of their births due to some circumstances or another.
My issue is, I don't really WANT her in the room while I'm in the throws(sp?) of labor. Yes, she is a sweet woman, and I'll even go so far as to say that her being there would more than likely not cause me any additional distress.
My grandmother raised me, and WILL be there - I really want this to be a special moment between me and her, as well as between me and SO. I don't particularly care to have this "special bonding moment" with my MIL. Also, to this day, when I am sick I call for my granny to make me better 
. I had surgery in September and she took a week off to help us out around the house and WOW - she was such a huge help that my SO tried to convince her to move in with us! I know having her in the room would be 100% beneficial for me. But I have no clue what MIL's bedside manner is like. That makes me nervous.
My granny would not be offended if MIL was present, and I kind of feel like SO would be if I said MIL could not be there. This is his moment as much as mine.... except I'll be splayed open and exposed, and I would rather MIL not know the status of my vagina, like, ever.
Am I being selfish for saying "no", when MIL has not done anything to show that she wouldn't be absolutely respectable throughout the whole process? And if I do go through with not having her there, I want to be as gentle and respectful as possible - any suggestions on how to politely but firmly say "No"?