I'm in agreement with you, the conversation does need to focus on the kids, even when he's telling you things.

I have a baby daddy of an ex husband and if in conversation to friends, currently I know about his employment, his cat and job offers. I do know a bit about his last roommate and some about a coworkers husband who is his friend. But, to drone on about him seems senseless.

His work affects the child support. Friendly but not gushing