Mystery solved! I called to say good night and after a few tears, he admitted what was bugging him, he misses his Mommy. I suggested (since we are on one of our two week rotations), that maybe he could have a sleepover here one night this week. He loved the idea and instantly said "tomorrow". I told him I would text his dad and ask and H has agreed.
I sent the text saying that I had just gotten off the phone with S, (who had gone to his room so he could talk privately with me) and that he seemed pretty upset and would like to have a sleepover tomorrow night if that was ok. H agreed and said he was just in talking to S and that S was pretty upset. He said he actually opened up more than he ever has before and that he will email me tomorrow with details. He also said S was doing better as soon as he told him he could come here for a sleepover.
A few more texts back and forth, H indicated he had hockey anyway so he had no problem with the sleepover and asked if I wanted both kids. I suggested that maybe D doesn't want to come and that maybe some undivided Mommy time would be better for S right now as I was a little worried about him. I suggested he ask D what she wanted to do first.
We'll see what his email findings uncover tomorrow on his discussions with S. I would suspect this whole thing is really bothering S and H will try to downplay, normalize and justify it all. I may allow him to do that with me but I won't allow him to do that to our S. I won't argue or disagree with him, I will simply handle our S the way I think it should be handled ... by allowing him to have his feelings, express his feelings without feeling threatened and helping him to work through them.
Me: 41 STBXH: 36 D: 11 S: 9 BOMB 12/2009 SEPARATED 5/2010 D SERVED BY ME 9/2010 FINAL D When I'm ready