Whitney Wright, thinking she's home alone, indulges in a secret lesbian affair with her girlfriend. But her plans are foiled when Penelope Reed, her roommate, catches them mid-act. Enraged and humiliated, Penelope decides Whitney deserves a special punishment. She forces Whitney to watch her masturbate with a strap-on, then brutally fucks her with it, teaching her a lesson she'll never forget. Whitney, aroused and ashamed, submits to Penelope's dominance.