Trivia: Almost all of the series' episode titles are either a line from or the title of a Stephen Sondheim song.
Trivia: Although Edie's ex-husband is called "Charles McLain", his name is never mentioned in the episode.
Trivia: In series 1, Richard Roundtree appears as Mr Shaw, who works for the Hafts Detective Agency. "Hafts" is an anagram of "Shaft" who was played by Roundtree in the 1971 film of the same name.
Answer: Kayla was sent away in episode 16 (The Gun Song) in season 4, after falsely accusing Lynette of child abuse. She now lives with her grandparents - probably Nora's parents.
I'm curious why we never see her again, why she never talked about, and why Tom never mentions visiting her.