The reunion continues as Lala and James argue over the demise of their friendship, Katie defends her ultimatum to Lisa Vanderpump, and Ariana and Lala reveal the steamy details of their backseat hook-up. Special guest Billie Lee dishes on the "Girls Night In" fiasco, her feud with Lala, and her secret hook-up with another cast member. Stassi explains the origins of her now-famous #OOTD Day, and Sandoval takes Andy Cohen for a wild ride in the TomTom motorcycle sidecar.