You should totally write a sequel ten years or so down the road, with Antonio working in a gallery/museum/wherever that's the focus of one of Peter's cases (not with him being a suspect, of course, because he's too awesome for that!).

Cue Neal and Antonio meeting.

Not only would Neal have a field day hearing all them juicy details about Peter's, uh, courtship of El, but I think Antonio might spontaneously combust once he lays eyes on our favorite conman. :D