This past week, my ex has called twice just to "chat". Seemed to be no real purpose to the calls. We did not discuss our son other than she asking what he was doing.
One of the calls was made while she was awaiting a delayed flight. She had been in the airport for several hours and I'm sure she was bored. We got stranded in the same airport many years ago and she asked if I remembered that trip and said this particular city brings her bad luck. It is the first time she has ever walked down the memory lane in a conversation with me.
She is still with the OM but this stuff just keeps getting interesting.