Fear and paranoia speaking, I expect.

But I also don't want to be around someone who isn't in full support of me and the kids right now.

As for how I could imagine someone would ever know???

Dad starts telling people about his concerns about me and parenting.

My wife is still in touch with lots of people in my extended family and circle of old friends on social media and it reaches her.

Information about his concerns are clipped from an email/text/social media between my wife and an extended family member or someone else from back home.

It would be something to sully me, or cast me into question in family court.