Trivia: Creator Marc Cherry and executive producer Bob Daily have cameos in this episode as movers during the last act.
Trivia: Roselyn Sanchez, who has an uncredited role as Carmen Luna in this episode, originally auditioned for the role of Gabrielle Solis.
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.