4MB, My kids are 13 and 10 and in the beginning I made sure they called and yes the couple of times they did not and I got blamed.
I see from your thread in Newcomers that your boys are 10,8 and 5. Certainly your 10 year old is old enough to call on his own but not the 5 year old. I will say from my experience that my own situation would be better if my D13 was on speaking terms with my W.
IMO you are not repairing nor damaging anything by making sure your boys call, and you might even go so far as you telling them "it is time to call Dad", whether they want to or not. If you make the call and your 10 year old does not talk that is his choice but your H can not lay that one on you.
My wife views her broken relationship with our D13 a major roadblock to the possibility of reconciliation. If I had to do things over I would definitely try to keep the kids more neutral.
I know how you are feeling, "why should I make our son's call, it was his choice to bail out on the family"......
If there is to be a road back for the WAS/MLC it is easier for them to travel that path if it is not so bumpy.
Cheers
Formerly "missherlove"
Me49 XW49 M17 T19 S16 D20
Expose yourself to your deepest fear; after that, fear has no power, and the fear of freedom shrinks and vanishes. You are free.