Season 1, Episode 10 "Ballad"

The glee club members will be singing ballad. Matt is absent, and Will replaced him and sings with Rachel who has a crush on Will, she visits Will's apartment, where his wife Terri puts her to work cooking and cleaning. After an encounter with Suzy, Rachel realizes her feelings for Will reflect her concerns about her own self-worth, and apologizes for her behavior.

Finn is paired with Kurt who advises him to sing his ballad to his unborn daughter. When Finn's mother Carole finds him singing to a sonogram video, she deduces that his girlfriend Quinn is pregnant. Finn has dinner with Quinn and her parents Russell and Judy and reveals Quinn's pregnancy to them in song. Disappointed in their daughter, they evict Quinn, and she moves in with Finn and his mother.

Kurt feels responsible for encouraging Finn to reveal the truth and apologizes, confessing that he is in love with Finn. Elsewhere, Puck tells Mercedes that he is the father of Quinn's baby, and Mercedes advises him to leave Quinn alone. The episode ends with the glee club coming together to sing "Lean on Me" in support of Finn and Quinn.