Don’t want mom in delivery

I’m most likely having my baby my Monday and I’m so torn and stressed... my mother thinks she’s going to be in the room but my husband refuses to have her or anyone else in the DR room..

I’m absolutely terrified to talk to my mother as she ignored me and threw a tantrum when we wouldn’t let her come to our first ultrasound.

I’m so upset and this is a unneeded stress at the moment. Any advice on how to tell her in a nice way where she won’t be offended?