How do you nicely tell your MIL no for the millionth time?

I have a scheduled csection in November, after telling my MIL that not only was she not allowed in the delivery room, we also, want our alone time with our baby after she comes, she's still planning on having a bunch of people go to the hospital and wants to see the baby seconds after birth. I know from my first baby, I don't want that. I was exhausted and I could barely move after my c-Section. My husbands idea of handling this is by telling her to screw off. It doesnt solve anything. What else can I do?