I just received an RSVP from the invitation that my fiance and I sent to my great aunt and her husband. On the RSVP, the names of my great aunt's daughter and granddaughter were instead written! WTF? We were very deliberate in creating our guest list, and because of our large families, extended family wasn't invited. Not to mention that I am not too fond of the two who RSVP'd. What do I do??