As a guy, yes, I would probably risk an office affair, but I’m also an idiot who craves physical affection and makes shitty relationship decisions, so my bar is pretty low. I think in your situation with medical licenses and such on the line though, I think it gets into a bit more serious territory (this already on top of the marriage/kids aspect). I think workplace flirtation though is just whatever if it stays that, you can maybe try referring to them as your “work-husband” and try seeing how comfortable they feel in that “role” or if they don’t really push it past that.

I actually have a lady at my work like that as well who I’ve thought there’s something there occasionally, we’d talk about risqué things and such, she’d sometimes put her hand on me when laughing at some dumb joke I made, but I recognize it’s way too easy as a guy to misinterpret casual physical contact as being something more than what it is. So I just pretend like nothing happened out of fear of misinterpreting something that isn’t there because I don’t want to spoil a good coworker friendship if I’m wrong. But I’d bone the shit out of her if given the chance.