What if I don't want my mother in law to shepherd people into my room?
Why don't you want your mother in law to let people in?
I don't want her to know anything about my private life.
I can understand what it might be feeling like to have that happen. Your mother in law should respect your privacy and it's okay to want that privacy. You might just need to have a talk with her.
It's not okay. She didn't treat me like that before I got married. I can't belive she did this to me.
It doesn't sound like something that cannot be fixed, honestly. I really still think that you should just speak with her and let her know that your privacy is to be respected.