My fiance and I are having a small destination wedding. 2 people who were not invited to the wedding already booked their flight and hotel. They found out our wedding info from another family member. We were having a small wedding for two reasons, first we only wanted it to be our closest family and friends and second we simply cannot afford a big wedding. What do I do at this point since they have already booked and paid? How do I prevent future people from booking? We did send out actual invites to our specific guest list, the 2 who have booked did not receive one of our invites