My FH and I decided to invite his boss and wife to the wedding. We just got their rsvp back with three attending! They took it upon themselves to add their daughter, who is 21. So not only is that another plate but another person for the open bar. Do I just ignore it, or ask FH to let them know that the invite was just for them?
I also know them personally and am close friends with other members of their family, which makes this more complicated.