Our RSVPs for August wedding are coming in. My fiancé's aunt and her 20 year old children (so his first cousins) are invited but we have said that the eldest cousin's boyfriend of about a year isn't as we are not having plus ones. My fiancé doesn't want him there, neither of us have ever met him and he has been extremely rude, bigoted and snobby to my mother in law on the rare occasion that they have met. None of us really want him there.
The cousin in question will know a lot of people there as it is a family wedding. The cousins all grew up very close.
We said all this and addressed invitations to members of the family.
Today we have had an RSVP from my fiancé's aunt saying that they were all looking forward to attending. She listed the names and included the name of the boyfriend.
AIBU to think this is really cheeky and inappropriate? WWYD?