<P> In the season one finale, Shelby adopts Quinn and Puck's newborn daughter, Beth . She leaves Vocal Adrenaline before the beginning of the next school year . Shelby returns in the second episode of the third season, having been recruited to lead a second glee club at McKinley High by Sugar Motta's father when Sugar is refused entry into New Directions . Shelby offers to include both Quinn and Puck in Beth's life . Struggling at being a mother, she forms a romantic bond with eighteen - year - old student Puck, leading to a sexual relationship before she tells him that their relationship is a mistake and resigns from McKinley in the eighth episode . While Menzel's musical performances on the show have been lauded, Shelby's storylines were characterized as rushed, incomprehensible and polarizing by contemporary reviewers . </P> <P> Shelby Corcoran is introduced in the fourteenth episode of the series as the coach of Vocal Adrenaline, a rival show choir to New Directions, the show's primary musical group . New Directions' director, Will (Matthew Morrison), on a visit to Carmel High School, meets Shelby and they end up at his apartment making out, but Will is unable to continue and tells her about his relationship problems . Shelby suggests that as Will had been with Terri (Jessalyn Gilsig) since he was fifteen and has immediately moved on to a new relationship, he ought to take some time out for himself . She later observes as New Directions' star singer, Rachel Berry (Lea Michele), and Vocal Adrenaline's Jesse St. James (Jonathan Groff) kiss, and exchanges knowing looks with Jesse . In "Dream On", Rachel confides in Jesse of her lifelong dream to discover the identity of her mother . While they are searching through boxes of records from her basement, Jesse takes a cassette tape from his jacket and pretends that it came from the box . The tape is labeled as a message from mother to daughter . Rachel refuses to listen to the tape, stating that she is not ready . Jesse later meets with Shelby, who reveals that she is Rachel's biological mother, but a contractual agreement with Rachel's two fathers prevents her from meeting with Rachel until she is 18 . She implores Jesse to convince Rachel to listen to the tape . Back at Rachel's house, Jesse starts the tape playing as Rachel enters her bedroom, then leaves her to listen to it . On the tape, Shelby sings "I Dreamed a Dream", leading to a duet with Rachel in a dream sequence, ending with Rachel back in her room in tears . </P> <P> While subsequently spying on a Vocal Adrenaline rehearsal, Rachel realizes that Shelby is her biological mother . After introducing herself, Will meets with Shelby, concerned that she is not as invested in forging a relationship as Rachel is . Shelby confesses that she can no longer have children, but wishes she could have her baby back, rather than the now fully grown Rachel, whom she feels does not need her . She tells Rachel that instead of trying to act like mother and daughter, they should just be grateful that they have met, and maintain their distance . Rachel hugs her goodbye, and they duet on an acoustic version of "Poker Face". In "Journey to Regionals", the show's first season finale, Rachel asks Shelby to help coach New Directions, but Shelby tells Rachel that she's tired of coaching glee clubs, and is stepping down as Vocal Adrenaline's coach to settle down and start a family . Shelby adopts Quinn's (Dianna Agron) baby, whom she names Beth at Puck's (Mark Salling) request . </P> <P> Shelby returns in the second episode of the third season, "I Am Unicorn", having been headhunted to coach a second glee club at McKinley High financed by Sugar Motta's (Vanessa Lengies) wealthy and doting father . Shelby reaches out to Rachel, Puck and Quinn . She lets Puck see Beth, but rejects Quinn's desire to do likewise due to Quinn's bad - girl attitude, appearance and behavior . Quinn quickly resumes her normal appearance, but reveals to Puck she is only pretending to behave in order to take Beth back from Shelby, and intends to pursue full custody . After Puck tells Shelby of Quinn's true intentions, Shelby informs Quinn that she does not want her in Beth's life . Shelby tells Puck that she is struggling at being a mother; as the episode ends, they kiss . Puck falls in love with her, but Shelby tells him in "Mash Off" that the kiss was a mistake . She compounds the mistake in "I Kissed a Girl" when she sleeps with him, and resigns from McKinley in the eighth episode, "Hold On to Sixteen". In the season four "Sweet Dreams" episode, which establishes that she is living in New York with Beth and is running a day care business, she tells Rachel to be original in her choice of music at her audition for the role of Fanny Brice in the upcoming Broadway revival of Funny Girl . </P>

When does rachel find out about her mom
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