I need help with a guest situation. We are having a very small destination wedding. Our venue will accommodate 20 guests. I invited a friend because she asked me to and I can't say no. Also, since her financial situation isn't great I didn't think she would go. This weekend I told her how stressed I was because the guest count was creeping up after my future MIL invited her siblings and we were reaching our max for our venue and would have to find a new place which was really upsetting me. Yesterday she sent me a picture of the RSVP card with her name and her nephew's name. WHAT??? I've never even met her nephew and he was definitely not on the invitation. I am so mad that she has taken it upon herself to invite someone even after I told her how upsetting it was to have to be talking about a plan B because of the guest count. And I'm mad that she feels so entitled to bring someone we have never even met to such a small, intimate event. I did text her after she sent me the picture yesterday reminding her again about the guest count and she never acknowledged anything I said. I hate confrontation but we are at the point that this one extra person could potentially put us over the max that the owners of our venue will allow and I don't want to have to find another venue because of someone else bring an uninvited guest. Would it be ok to just tell her sorry but we really don't have the room for your guest? It makes me feel bad but honestly I'm so mad right now that I don't even want her to go.