<P> In season one, Brooke Davis is introduced as the captain of the Tree Hill High School cheerleaders . She takes a liking to Lucas Scott when he joins the school's basketball team, attempting to pursue him in her usual, sexual advances . Lucas, however, is only interested in her best friend, Peyton Sawyer, and constantly turns down Brooke's advances . After a drug incident involving Peyton, Lucas comes to realize that Brooke is actually a very loyal and caring person, eventually developing feelings and entering into a relationship with her . When Lucas realizes he still has feelings for Peyton, he and Peyton begin a non-sexual affair behind Brooke's back . </P> <P> Lucas breaks up with Brooke, but Peyton decides to end their secret romance because she feels guilty and doesn't want to harm her relationship with her best friend . When Brooke finds out what really happened, however, she ends her friendship with Peyton and refuses to speak to her or to Lucas . During this time, Brooke experiences a pregnancy scare, eventually learning that her results were actually negative; however, in the heat of an argument with Lucas, she lies to him and tells him that she is pregnant with his child . When she comes clean about the truth, Brooke explains that she wanted to punish Lucas for cheating on her with Peyton . After uniting against Nicki (Jake Jagielski's ex-girlfriend), Brooke and Peyton agree to a truce and slowly begin to rebuild their friendship . </P> <P> At the start of the second season, Brooke is forced to grow up when her father loses his job, thus forcing the Davis family to sell their belongings and temporarily become destitute . Still hurt over the way things ended with Lucas, she begins relations with her neighbor, Felix Taggaro, who becomes a "friend with benefits ." Later, things become strained between Brooke and Mouth when he tells her that he is in love with her, despite the fact that Brooke thinks of him as a "little brother ." Meanwhile, she begins dating Felix after he promises to not break her heart as Lucas did . </P> <P> During this time, Brooke decides to run for Tree Hill's student body president against students who are much more studious, hard - working, and experienced . Even in the face of the dirty political campaign of her rival, Erica Marsh, she doesn't back down and ends up winning the student election after Mouth delivers a touching recommendation speech to a packed auditorium for her . After the election, Brooke quickly repairs her friendship with Mouth and even befriends her defeated rival, Erica . </P>

When does brooke find out she is pregnant