So, one of our groomsmen (who is coming in from Maryland) decided to ask me yesterday if his girlfriend can come to the wedding (only three weeks away). We have tons of wiggle room on our guestlist and budget, so I said sure, no problem. We're not even having assigned seating at the reception, so it's really not a big deal.
Then today, after ironing out some details about lodging, I realized that her coming would add another person at the rehearsal and the dinner, which my FMIL hasn't been the friendliest about, and I really can't handle another person at my rehearsal, especially someone I don't know. (I know it's only one person, but I'm so stressed out I've developed a twitch and haven't slept in almost a month.
I don't want a stranger at my rehearsal or my rehearsal dinner, both important, intimate affairs, but I'd feel bad making a girl, any girl, sit in a hotel room by herself somewhere. I didn't even know this groomsmen even had a girlfriend until yesterday.
I really don't want to sound like a bridezilla, but I have no idea how to tell people that only people directly involved with the wedding are included in the rehearsal and rehearsal dinner (I know what etiquette states about out-of-town guests, and I wish my FMIL would listen. I pulled out Emily Post and everything and she's still adamant about who's invited to dinner). Help!