My fiancee and I are getting married May 15th and are in the process of getting back RSVP's. Our cutoff date is next week and then we will start making calls to anyone who hasnt sent one back yet. We received one back this week from my Aunt on my Dad's side RSVPing for 4 people, when we had only invited her and her husband. She has two grown sons from a prior marriage (they each received separate invitations) so at first I thought she just included them by mistake.
I called her yesterday for some clarification and she told me that one of the extra people was her son, but the 4th person was her 13 year old granddaughter, who I've only met once like 10 years ago. She went in to this whole explanation about how the grand-daughter hasn't seen any of the family in 10 years or so and it would mean a lot and the girl's mother had finally agreed. Of course, none of this was told to me beforehand and now they have airfare, hotels, etc. I explained to her that we had a firm guest limit but privately I know that we have some people not attending so there would be room to add her to the list.
My question is, is it worth putting my foot down and saying the grand-daughter cannot come to the wedding or should I just let it go at this point?