Mother in law issues, what do I do?

So I'm 35 weeks and 1 Day my fiance wants his mother in the labor and delivery room but I am 100% against it. She's rude, she's so negative, and she likes being in control of everything. I've decided from day one that I don't want her in the room. I want my mother bc one we aren't married so medical choices if I am unable to make them fall to my mother. I want my best friend bc she was the one in the room when I had my first son and obviously I want him in there. I'm most comfortable with these three and he doesn't get it. We've been arguing about this since the betting of this pregnancy. I told him recently that ultimately it is my choice and he really has no say but now I feel like I'm being unreasonable. I have my reasons why I don't want her in there. One being I don't want her to see my vagina, two she can be very rude to me and everyone else, three she is very negative, four if she's not controlling the situation she's a bitch, and four I wanna be relaxed not stressed and five were trying young living essential oils and I'm trying this all natural. She doesn't believe in natural things working and she's very negative when it comes to me using natural things rather than western medicine. What do I do?