My Fi and I set out from the very beginning that we were not going to allow +1 unless we knew both people in the couple. Or at the very least had met both. My MoH is my Fi's younger sister. She texts me asking if she can bring a date. I did not know that she was even dating someone but apparently she has for about two months. I simply text back "No. We already have the guestlist set." and because we don't know him and we are trying to minimize the number of guests that we don't know. She simple texts back "Ok."
A couple weeks later, my Future father-in-law (who spoils her rotten) goes behind my back to ask my parents if she can have a date after I've already told her no. So now I'm sitting here being pressured by my future father-in-law through my parents to allow her to bring her 2 month long BF who I don't even know his name.
I'm more mad about people going behind my back after I've already made a decission. Am I being unreasonable?