Hi - i also feel a shift in H. Funny you should say it, but it isn't anything i can put my finger on either.
I saw H in weekend and he was seeking validation for a decision he made. He wanted my opinion or approval. I dont know about OW being in picture as H has gone quiet recently on that as well. So either it has gone under ground as kids were not happy or H is seeing the light.
Either way I am not over thinking it as that makes me more tangled up in his life.
Try not to read anything ibto what they are doing. It is easier on you and nothing you can do to change a single thing anyways.
