S12, E23: When a young woman finds a teenage boy asleep and naked in her bedroom, his mother, Bree Walsh (guest star Rita Wilson), is quick to defend him. While Detective Benson (Mariska Hargitay) and Detective Stabler (Christopher Meloni) try to figure out what truly happened, they also have to manage the sneaky teenager and his naive mother. As the detectives dig deeper, they discover how deceptive appearances can be.