And Bob, here's an idea for your wife to consider and one that I'm going to start practising with my grandkids as next year we will be moving away from them. My granddaughter loves all things 'kitty' so starting this week, I am going to make a point of sending her a little card, or a picture or maybe a little toy that depicts cute kitties once a month. And as she learns to read, the cards will have age appropriate messages from me to her. My grandson will be a little harder to do because I don't think I've ever seen a Star Wars card or computer game cards but I'll try to find little things to send him too. And as they grow up, they will always know that Grandma was thinking about them and their interests, that I was interested in the things they are interested in. And it will help me to feel good about being involved in their lives even though there's distance between us because I'll be looking out for little special reminders of love. And as your grandchildren are willing to talk to you on the phone, the cards are a continual reminder that you love to talk with them too because you can say something like, 'I can hardly wait till our next chat on the phone...' or something like that.
Maybe your wife would enjoy adding something like this to your current relationship with the little ones? And it seems to me, that maybe over time, your daughter in law might even be moved out of whatever inner turmoil she's dealing with, to take a tentative step through that door too

. Stranger things have happened in this very strange world.