If he knows about your love life, it means that he has been keeping tabs on you.
He wants to scour the crowd for competition and may even give you some hard-hitting relationship advice.
However, he will not likely talk about his wife.
As much as he can, he will try to keep her invisible, as if she does not exist at all.
He does not want to have to answer questions about her.
You will get vague replies if you do ask. married coworker crush signs