how many people are allowed in the delivery room?

Bryant

So it's me and my bfs mom's first grandchild and I don't want to be rude but I only want my mother and him in the room but I know both of the mom's want to be in the room during delivery and I'm pretty sure only two people can be in their. Is it wrong to keep his mom out while my mother is in their or should I just keep both mothers out and have just me and him I don't want to be unfair. but I still really want my mom in their for me too..