Well thank you for your support. It gets worse. Yesterday was our wedding anniversary and not one word has passed between us since he left. It was of course possible for me to contact him but I decided that since he'd utterly spoiled my enjoyment of my Mothers Day greetings, I was not going to help him get out of the hole he had dug. Since I emigrated, my participation in Mothers Day love-ins with my sons has always been limited by the distance, so my cards/gifts are doubly appreciated you see. (The irony is that last year I went to see them for Mothers Day and what do you know - I learned of my daughter-in-law's plans for divorce that very weekend!)
I don't exclude him from my relationship with my sons, quite the opposite - I make sure that he is fully au fait with everything to do with them and he enjoys their company, but he generally excludes me from the rather secretive one he has with his daughter. His son makes no contact with him.
So now that our wedding anniversary is over without a word or gesture from him, no I doubt very much whether he will get in touch. He's 69 years old going on 7.
If it wasn't for the fact that I have a young kitten, I would not be here when he gets back..but I'm not going to make her suffer by playing tit for tat.