Stephanie Ricki Lake and Doug Heffernan (Kevin James) in scene from the Season 3 episode "Class Struggle" (#3.54).
Stephanie Heffernan is Doug's kid sister and the daughter of Joe and Janet Heffernan. Played by actress/talk show host Ricki Lake, Stephanie, who first appears in the episode "Class Struggle" (Season 3, Episode 4) briefly dates Doug's friend Richie (Larry Romano). Stephanie appears in six episodes of the series.