My friend has organised a baby shower for me, I added all names of people I wanted there. I mainly invited a small group of close friends, sisters from both sides, MIL’s and a couple of aunties from each side. My future MIL has added 6 cousins from my partners side which has caused a bit of an argument as she didn’t ask before adding and I have around 20 cousins that aren’t invited as it was just going to be a small get together. There has been no conversation since she has had to remove them from the group and my partner originally agreed with me and has now asked what the problem is. I have never met these cousins nor does he see them, I just feel it wasn’t her place. Am I being unreasonable?