They have such a high need for validation that any affirmation from elsewhere is craved.
Do you think he has any inclination for cheating or is it mostly just an emotional affair?
I dealt with this to some extent, but I’m not sure how much of it was an *emotional affair* and how much was just a compatible coworker relationship.
My husband got close to a woman he worked with and she even helped with our wedding plans. At one point she let it slip that she was looking for “someone just like J”.
I’m not jealous by nature, though my ex husband put me through some real tests with his repeated infidelities. I did wonder how close they were, but I was more concerned about
her intentions than his.
I never said anything about it and he no longer works with her, but has kept in touch with her. Now she’s going through a legal battle of her own making and he’s briefly advised her and thinks she’s really shooting herself in the foot through hubris and narcissism. So I have my answer there.
Recently I’ve seen him do something similar when he’s been a significant donor to the local radio station. A woman there has been very inclusive to us in small events where only *select* people are invited, though we haven’t attended because of Covid. I noticed that he was saving all her voice mails.

I have to believe it’s because they’re so needy of validation and they get accustomed to those they are living with, so our support is never enough. Therefore getting attention and appreciation outside their primary relationships is a big f*ing deal.
It can be annoying, but if he’s not inclined to cheat, I wouldn’t make a big deal out of it, or you risk pushing him further in that direction.