A lady sent in her RSVP last week and added her 2 daughters. I didn't really want her there either but I should've been more firm with the guest list. I don't want the daughters there and want to be firm with adding guests. My mom said she doesn't think she'll come without her daughters but her mom is also invited so she'll know people. My mom offered to pay for their meals but it's not just money. So if my mom talks to them how could I politely word the daughters aren't invited?