So I'm just curious about the etiquette surrounding an issue I'm having and wondering what the correct line of thinking is.
When I asked my bridesmaids to be part of my wedding party I said upfront that I would love for them to bring plus 1's if they so desired. Bridesmaid #1 is in a longterm committed relationship and will be bring her girlfriend (sidenote: it will be their first completely "out" event together, yay for them!). Bridesmaid #2 is also in a longterm relationship but her boyfriend is a marine and will be stationed overseas at the time. Bridesmaid #3 is single.
Ever since the day I got engaged Bridesmaid #3 has been obsessed with finding someone she can bring to the wedding. She is very concerned that she won't possibly have a date by the time the day rolls around (looking more and more likely, since it's 4 months off by now). The other day when we were discussing something related to the topic of plus 1's, she said something along the lines of "At the very least, I'll just bring [name of other female platonic friend]."
I thought this was rather surprising because I guess I sort of thought plus 1's were for romantic partner's only, not just to choose a friend to tag-along. Am I incorrect in this thinking? The friend in question that Bridesmaid #3 is supposedly planing to bring failing all else is a girl that I have met, but we aren't friends, nor is she friends with anyone else at the wedding. Bridesmaid #1 is peeved because she feels like if Bridesmaid #3 brings a friend who is a girl, others will automatically assume that her girlfriend is also merely a "friend who is a girl" and that is obviously a little hard to swallow with this being their first big outing together (obviously she wouldn't make a huge deal of it, but I still feel for her).
I guess I just felt a bit... annoyed is too strong a word, but I have lots of friends that I wish I could invite to my wedding but am choosing not to for budget reasons, so it felt a little off that some random friend of a friend would be there. I guess practically speaking, not than different than if it were a new boyfriend, but still unusual to me.
Thoughts?