I just found out someone RSVP'ed with a +1 at my bridal shower. A family member had mentioned that a few family members were all carpooling with a cousin of my parents. When he mentioned the names, I assumed he was mistaken when he mentioned a cousin of my parents that wasn't on the bridal shower invite list, because she is not invited to the wedding. Later that day, I was talking to a bridesmaid who said someone had RSVP'ed with a +1, and I realized it was this cousin.
I talked to my parents about it last night, and they said they didn't know anything about it. I would add her to our invite list for the wedding, but one of my parents has over 50 cousins just on one side, and she is one of them. They had no idea if I should invite her now or not.
We don't plan on adding her on, but the bridal shower is later today, and I'm hoping she understands we couldn't invite everyone we wanted to invite, but she simply wanted to be included in the bridal shower. My question is how do I respond to her if I'm wrong, and she thinks she is invited to the wedding? Our invites are going out next week, so it won't be obvious that everyone else got an invite and she didn't.