Mother in laws

Anyone else deal with a crazy mother in law? When she heard that my husband and i are trying to get pregnant she demanded that she be the first one to know, she said she wants to be in the room, she also wants to move to where ever her grandkids will be 🙄 now that we are actually pregnant i don’t want to tell her. Mostly because i know she will blast it all over social media before we can tell everyone, and she will try to be way to involved. How do you deal with this?