MIL driving me crazy with baby shower

The invites have already gone out for my baby shower (my sister is hosting) and my mil keeps sending me more people to add to the guest list. It is driving me crazy! She is asking me to invite these poeple I know she doesn't have much contact with, and frankly, I don't like. I don't think it is polite for her to keep adding people when it is not at her house. My mom is cooking for everyone. What do I do?

Also, she is basically forcing herself into our home this weekend to build a closet organizer in the nursery that I don't want. Uhg, I just need a break from her.