Oh, I think the affair is still going on. That's what "The Right Girl" is about, and at the end of the song he believes that he's going to leave Sally for Margie.
Also, his whole speech to Sally about Margie is in the present tense. Not definitive, but indicative perhaps.
Of course, by the end of the show, it may be that he won't be seeing Margie again.
Updated On: 11/13/06 at 05:34 PM