What exactly does it mean when a coworker calls you his work wife?

[Anonymous]

Coworker (2 months) and I are totally into each other, but he has a “girlfriend” thats really just consistent sex, so he said. He and I had the talk and I let him know we can only be friends no chance of anything else right now since he’s not single and I still wanna get to know him. We flirt all day everyday. And he calls me his work wife.

does he think there is a chance at sex even tho we already talked about it and I told him no sex?

[spartan55]

Your last paragraph no sense, you realize that, right?

[Asker]

I didn’t realize. I talked to text.
I already told him I don’t have sex with people quickly so he knows there’s no chance is what I was trying to say.

[In_Trance]

It means he's a massive douche