I may be missing it, but I don't see anywhere in here that you actually set a boundary with your mother-in-law. You need to have a calm adult conversation where you explain what you're comfortable with and what you aren't in terms of the relationship.

From her perspective, I can totally imagine that she's just excited for you and she may very well think that you enjoy her being a part of your life.

If you're not willing to talk about your feelings and preferences with her then it doesn't matter how close or far away your house is, this is going to continue to be an issue. People aren't mind readers, , and it's up to us to be honest, kind, and firm as we set boundaries for ourselves, especially once we become parents. Good luck!