Do you find yourself any more empathetic for your H after experiencing this pull/attraction first-hand? I can easily see how someone going through a difficult time could succumb to the attraction. It takes a lot of strength to reject it, especially if it's right there waiting for you, as OP usually are. (Similarly, it's believed that those whose souls are weak are easily manipulated by black magic - if you believe in that kind of stuff.)
Leave H alone for now. I know there were times when my H went through the same. Don't assume it's about you or the kids. Something's going on in his messed up world and he's taking it out on you. Be nice to him to save yourself the stress of dealing with him.
Happy Birthday to your S! My S is also turning 7 and having his party this weekend. What a coincidence.
You might find me odd after I tell you this, but you were in my dream the other night! I wish I could remember more about it, or at least tell you parts of it to see if any of them are true... Can't ask on here without revealing too much about yourself. Wish they'd allow PMs!