Boyfriends mum

I'm 33weeks pregnant and talking to my bfs mum a few days ago when she mentioned coming into the room a few times while I'm in labour to allow her son to go get something to eat and im not alone ect. This is very nice of her but I don't want anyone waiting around the hospital until my daughter is born and my own parents have been told I will.let them know when I'm ready for them to come meet her. How do I approach this with my boyfriends mum? We still live with our parents so not telling her I'm in labour isn't an option especially if it happens at their house. We get on so well it's just personal preference not wanting anyone waiting around or coming in and out. My own mother has been told the same but it was off course easier to approach it with her.