Oh yeah - the ex-wife might be a problem. She is exactly at the point where she is wanting her ex to be on the shelf as her possible Plan B, probably realizing what a mess she made of it all, and you are in the way. And he's such a devoted dad, it's possible that she might step up her approach to him and he might feel he has to give it another try for the sake of the kids.

Not sure whether it's better to go - and see who you're dealing with (you know, keep your friends close and your enemies closer) OR to stay away and remain a mystery to her for a while longer so you don't trip that trigger of her suddenly realizing she's lost him and going into overdrive to get him back. Hmmmmm....