AITA for not inviting anyone from my fiancé’s side to my bridal shower?

My fiancé and I are getting married at the end of this spring and my bridal shower is at the beginning of next month! I’m so excited and I can’t wait to get together with those closest to me to celebrate. I have an amazing MOH who was able to book the place where my FH and I had our first date and then a year later got engaged, but they only allow a maximum of 40 people (including me). I know it sound bad that I didn’t invite anyone from his side except my FMIL, but I don’t know any of them, none of them have made the effort to get to know me or even talk to me. His mother blames me for everything and likes to make me the bad guy whenever she gets the chance (she literally threw a fit when we were thinking about taking the kids on a vacation with just us and without his parents tagging along) she goes and calls her sister or friends and talks carp about how horrible I am and her sister goes and tells the same to the rest of his family. It got so bad that he had to have his dad as his best man because none of his family members “support” our marriage, keep in mind the ones he asked are all people I’ve never met or even talked to. Given this I decided that the 40 people I invite should be the women from my family and my closest friends who support me no matter what and are so excited and happy for me. However my FMIL decided to tell one of her friends that she was invited (she’s not) and I had to tell her that unless someone els can’t come then her friends isn’t invited, especially since my list was already 43 people and I know I met this women once but I can’t even picture her face but I’m not going to tell one of my family members they can’t come so people who I don’t even know can. I wasn’t trying to upset anyone, I was trying to make sure this was going to be a good experience for me and that I would be surrounded by those who mean the most to me but according to her I’m a terrible person and this is going to be such a bad time for her.