<P> When troubled teen, Jimmy Edwards, brings a gun to school, Haley and Nathan end up trapped in the tutor center with him during the shooting . After the death of Keith Scott they realize how they need each other and decide to move back in together . During a weekend getaway at a friend's cabin, Haley ecstatically accepts Nathan' proposal to renew their marriage vows in front of all their loved ones . The wedding takes place in the season three finale, along with a shocking cliffhanger in which Haley might be pregnant and Nathan' fate is unknown . The episode ends with Haley's calling for help . </P> <P> During the premiere of season four, Brooke was viewed as being the one pregnant, but after a few episodes, it was discovered that Brooke was covering for Haley's pregnancy . When Brooke finally told Haley she couldn't pretend to be pregnant any more, Haley realized it was time to face Nathan and tell him about their baby . Because of Haley's and Nathan's debt, she's been working shifts at Karen's Cafe and has been tutoring Rachel in Calculus . On the day of the State Championship game Haley is found on the bathroom floor in pain, the other girls including Rachel, Peyton, Bevin and Brooke rush her to the emergency room . The doctor told her she would be fine but it was stress causing her problems, and told her she was having a son . After the State Championship game, Haley jumped in the way of a car that was about to hit Nathan . The car was being driven by Daunte, as revenge for Nathan's betrayal after he was lent money . After a string of operations, she was fine and to her and Nathan's delight, they find that the baby has a heartbeat of their son . After Nathan tells her what he did, she freaks out and leaves; but eventually forgives him . He then buys her a maternity prom gown after winning the stripping contest . </P> <P> We find out from Haley's class assignment with Skills that if she doesn't pursue a singing career she wants to be a teacher . She also fears that her son will not find his place in the world, like she sometimes feels . In "Pictures of You" (episode 4.13), Skills assures her that he will find a place and that he will make sure of that . Meanwhile, the person who stole the Calculus test is still unknown so the whole Calculus class takes a retake to find out who the cheater is . Rachel puts Brooke's name on her test so Principal Turner assumes she is the one who stole the test . Principal turner confronts Haley about this and Haley knew she could not trust Rachel . Haley also loses her job at the tutor center for letting a student get a hold of the key to the cabinet with the tests . </P> <P> At a party later that night Haley confronts Rachel about "stealing" the Calculus test and slaps her (also for hitting on Nathan). Rachel then tries to push Haley but is stopped by Skills who asks her to leave . Rachel takes the fall for Brooke because she wants Brooke's fashion designs to be sent to Victoria's Secret . By the end of the night, a sex tape is revealed of Nathan and Brooke . Haley as well as everyone else is left in shock . Haley is a little overemotional due to the fact that she is pregnant so she does not take the video lightly . She asks Nathan to write a list of every girl he has ever slept with . In the end, Nathan writes the list, but Haley doesn't read it because she knows that she is the only one that matters because she is the only one he has ever loved . They go to the prom together and are really happy . Days after, the gang goes to Honey Grove, Texas, to help Mouth . Their car breaks down, where Chris Keller rides up in his tour bus . They crash the prom there, where Haley finds out it was Brooke who stole the Calculus test . Haley is mad at first, but she forgives Brooke . Once back in Tree Hill, Principal Turner tells Haley she cannot make her valedictorian speech, because of Nathan's point shaving . Nathan finds out, and fixes the situation, and Haley gets to make it . She then visits Whitey at his house to talk about Nathan . In the middle of her valedictorian speech for graduation, when she is quoting Julius Caesar, Haley begins to laugh nervously and bend over in pain . It turns out she has gone into labor with her son . Everyone looks shocked and Nathan stands up in excitement . </P>

When do hailey and nathan get back together