In this mess we have created for our children, regardless of the circumstances and the knowledge that it needed to happen, our children feel very out of control of everything in their lives. I see this as one way they can feel they have just a tiny bit of control. When My kids are with their dad my oldest calls me often, but I never talk to my youngest. It's just a difference in kids I guess. And I don't call them either, as much as I'd like to. That's their time together.

I don't call my kids either. I figure his time is his time, as much as I hate it.
When I went to Texas last year for 2 weeks. I called my boys every night, they were at my Moms house and my youngest NEVER talked to me. I would hear him say to my Mom "tell her I love her" That was it. They are not phone people, didn't hurt my feelings as long as I knew they were okay I was fine.