It is tough at first to realize that another fatherly-like figure will be in your kids lives. For me, I had to talk with the OM to find out what kind of man he was. He seems like a pretty good guy and my kids like him. Because of his age (68), he is more like a grand father they never had (X's father is deceased).
My X has yet to meet or talk with my girlfriend but I am sure she hears all of the good things from the kids. We have a recital coming up and the X asked if my girlfriend would like to come. It should be an interesting moment when they meet.
It is hard to predict what kind of guy (if any) your STBXW will find for a long term relationship or marriage. This is not something you can control so dont let it worry you.
