You have a PM....
Lay a trap?
Did that here a few years ago and on the phone.
Simply tell the kids something that isn't true and see if it's makes it rounds back to you via the EX. However, it won't "work" if the kids tell the EX everything anyways.
See -- if your son truly wants to talk to you, then he won't tell Dad about the yahoo account or what you two said on the phone.....and that's what your other posts read like or sounded like.
You're entitled to private conversations with your kids -- or private memories. Maybe that's what you need to encourage when you do see him -- that you two deserve a relationship separate or independent of DAD.
Actually what happened to me (here) was that I posted something and only part of what I said made it's rounds. Then I showed the child the whole post and she said "Geez, I guess I didn't get the whole story." It was like what gets printed in the National Enquirer...only part of the truth and not the whole scoop.
BTW -- My EX and his fake-wife read here and are probably printing this post off just to show how "mean and vindictive" I am and all the games I've played in the past -- forgetting the true intentions which is to expose their true colors. And it worked like a charm....