Wait fbi guy is married and has a daughter and still played with yoon's feeling wtf ?!

I think it was mentioned that he had a wife, fooled around with Yoon who didn’t know (while he was undercover). He and his wife divorced for whatever reason after the undercover op ended. He “came back” for Yoon, but he wanted him as a spy so I doubt that reasoning was genuine. Pretty sure this is the first mention of his daughter though