So I'm kind of in a sticky situation.
We're having a small (40 people) wedding inviting our parents, grandparents, siblings, and bridal party. My grandma lives out of state and isn't comfortable travelling alone. I spoke to her after we set the date and from our conversation, she said that she couldn't travel alone and my aunt (who lives by her) would fly with her and they were booking plane tickets to come up here. At this point, we hadn't definitively decided the guest list, but indicated that it would be kept very small.
We ended up addressing the invite to "Grandmother and guest" because we knew she would need help and that Aunt was escorting her. I knew that my aunt thought she might be invited, but figured the lack of invite would make that clear.
However, I found out that my mother had a phone call from my grandma, and my grandma had told her that Aunt and Uncle and their kids (adults that live on the other side of the country than all of us) were SO excited about the wedding. My mom said that she didn't remind grandma that they weren't invited because sometimes my grandma doesn't really get what is going on anyways. I told my mom that she should have told grandma that only SHE was invited. Nevertheless, we hadn't talked to Aunt, Uncle, or Cousins at all until this email.
Grandma RSVP'd. We then got an email from Aunt saying, "I'm RSVPing for me, Uncle, Cousin, and Cousin."
Now, when I talked to grandma it didn't sound like Aunt AND Uncle bought tickets, or else I would have explained that only parents and grandparents are invited. If Aunt had RSVPed for just Aunt and Uncle, I could probably understand that it was a lack of communication and since they already bought plane tickets, we could handle it.
However, both cousins are RSVPed too! The wedding is only 4 weeks away, and I'm pretty sure they've arranged travel already.
To make things even more complicated, the maximum at our wedding is 48 people, and we now have 49 people. We could probably squeeze in an extra chair, but still.
I'm mostly annoyed at my mom for not correcting grandma right away with that phone call. At this point I'm not really sure what the best option is. Any thoughts?