So I caved... my little fingers did the walking and I dialed my MIL in Italy. She and I are close and talk often, but I hadn't ever told her what my ex has been up to... Sleepovers with new girlfriend w my kids, etc. She was predictably upset (with him). I thought I'd feel better, but I felt like a heel. I apologized. Not my finest moment.

Later in the day I was driving my daughter's friend home and she lives in the same neighborhood as my ex (right up the street). As I was leaving, I found myself staring at the OW as she was getting her stuff out of her car to go into his house. I had never seen her and wouldn't have know who she was, but my kids told me when they saw her. She stared at me -- not sure how she knew - she seemed to know me as soon as she saw my car -- she was looking at me before I put 2 and 2 together. Later my 4-year old asked if she could go to her dad's house to see the OW... Blah....