Melanie is shocked to discover that her stepmom, Alex, has been sl--ping with her boyfriend. She confronts her stepmom who shockingly tells Melanie she'd be happy to teach her some tricks that will keep her man from straying. Aria catcher her stepmom cheating and doesn't know what to do, but Trinity knows that having her stepdaughter as an ally and an accomplice is one way to keep Aria from sharing her secret.