The "betrayal" of the title is multi-layered, but the centerpiece is Courtney Whitmore’s clandestine training of Cameron Mahkent. While Courtney views her help as a way to guide Cameron toward "being good," her teammates see it as a dangerous alliance with the son of the man who killed the original JSA.

: Courtney helps Cameron control his ice powers, leading him to create a massive ice sculpture of his father, Jordan Mahkent—a stark, chilling reminder of the legacy Courtney is fighting.

While Courtney trains Cameron, Pat and Barbara embark on a "recon mission" to the Mahkent residence under the guise of a neighborly visit.

Review: Stargirl 3x06 – " Frenemies — Chapter Six: The Betrayal "

The hunt for The Gambler’s killer takes a sharp turn when Yolanda steals a laptop from Cindy’s room, convinced it’s the "smoking gun".

: Pat and Barbara's fear that the grandparents possess powers is confirmed when Courtney mentions Cindy's suspicion that they share Jordan's abilities. Cindy, Yolanda, and The Gambler’s Laptop

The mid-season of DC's Stargirl Season 3 reaches a breaking point in " Frenemies — Chapter Six: The Betrayal ," an episode that trades heavy action for gut-wrenching character shifts and long-brewing secrets finally exploding into the light. The Secret That Shattered the JSA