could you help him see what she is trying to say? Maybe help him develop a better way to talk with her. In my opinion its about the kids and making it easier for them.
Only if he asks. Help is help only when it's asked for no matter how well-meant, otherwise it can be seen as meddling of belittling.
In validating, say something that puts you both in the same boat. "H, I struggle with knowing how to answer D sometimes. It seems you're getting a handle on it." But only if the situation arises.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss