NO. They were NEVER married. PERIOD.
I don't know how many times goofy people keep asking or bringing up the ending of Muppets Take Manhattan with the 'wedding' at the ending. How hard is it to figure out that it was NOT a real wedding. It was a BROADWAY PLAY that they did. The wedding was just the last scene of the play that they were doing which means that the marriage never really existed. It would be about as real as actors/actresses in a movie or a tv show actually being married when their characters were getting married...