I sent an invitation out to a family friend and the invitation was addressed "Mr & Mrs..." It did not say and family. I received the RSVP back and they wrote "Mr. and Mrs and Family" Is it wrong to call them up and say that their kids were not invited? We really can't afford to add people that were not on the list. This would bring the count from 2 to 4. They are not little kids so therefore we would be paying full price.