updated: 06/10/2004
A scam to test the Average Joes: Larissa goes out for the day and in her absence the Joes are questioned by her overweight Mom who later reveals herself to them as Larissa in a fat-suit, prosthetics, contact lenses, new teeth and a wig. This was almost identical to the gag pulled on the Joes by Melana Scantlin in the original Average Joe: apparently both series were filmed before the first one was transmitted
The show showed the makeup process as seen here: you can also see the completed makeup and the reveal scene.
Michael Burnett (Michael Burnett Productions) was responsible for this makeup.