Mom vs husband in delivery room

Danielle • Mama to an 8 year old and one on the way!
I had my first child when I was 21 and the babies father was not involved. My mom was in L&D with me the whole time and the only one besides doctors when the baby was born. Now 8 years later im pregnant with my 2nd and married. My husband wants it to be just us in the delivery room, and I agree. However my mom has already started talking about how she will be in there too, she's never asked just said yep I'll be there. She is a bit of a control freak and honestly I want this special time to be with me and my husband ... What do you think is the best way to tell her? I know she wil not be happy but I also know that I won't be happy if I don't tell her...thoughts??