Just got an email:
We are looking forward to coming to your wedding.
Please put us down for 4 people. Might have 5 but unlikely.
The family that is included on this particular invitation is 3 people: Dad and 2 kids, who really are no longer kids. The Mom passed away a couple years ago, after losing her 4th battle with cancer. They're close family friends, although since the Mom passed on, they don't keep in nearly as close contact. At any rate, the Dad has had a new girlfriend for about a year now, and I'm guessing that she has a child as well. They are not invited, as my Mom does not want her there, and considers it to be an insult to her friend's memory. I don't want to hurt feelings, but need to tell this man that it's only him and the kids who are invited. Words of advice?