delivery???

My SO has told me multiple times through my pregnancy that he's nervous he's gonna pass out or not be able to handle going through all the bits and pieces of delivery with me. So my mom is planning on being there through delivery just in case my SO can't handle it plus I think I'll feel better if my mom is there cause she knows me and will know how to help me a lot more than he will. Not saying that my man won't be helpful but he's a very rough around the edges type of guy. That being said, did anyone else have their SO not sure if they could handle the delivery and how did it all turn out for you? And now he's saying he wants his grandma there which I don't want to be mean because I know his grandma is the person who raised him but I don't want her in there cause it's a private thing for me and the only reason my mom is coming is because he's told me he doesn't know if he can handle it and I don't want to be alone in there if he can't... am I being unfair to him? Like if my mom is there he can have someone there? and if not... how do I tell him I just want it to be us three without sounding like a total selfish asshole???