He would understand her being upset about it, but it will kind of be her fault. Kathleen is likely watch from the side lines, but she would have something to say about it later. 

He'll sigh and feel bad for making her cry but he will still be upset himself. He will reach out and stop her from walking away from him again. "Exactly 45 years, and if you had listened to me at all, you would know that the only reason I didn't leave as soon as the talked about the other coven joining. Is because I wasn't going leave your side, if you should have told anyone you were leaving it should have been me." He wouldn't even be upset she left, it would be that she didn't tell him. "I would have left with you."

Was it really? It does look like you did it on purpose, Atty most have just taken over.

Once I get theirs done and everything I will share as well.