Amy copes with the rigors of motherhood while Anne adjusts to the news that she is pregnant. Elsewhere, a tragedy takes place just as Jack and Grace's relationship intensifies.

Grace is struggling with what has happened, whilst Ben wonders what part he plays in Amy's new life.

When Grace begins to pull away from everyone, Ricky takes it upon himself to try to help her out.

Amy is having trouble copy with her hectic lifestyle now that she has school and a baby to look after. Ben begins to decide how he will be spending his summer break.

Amy tells her mother that she will go to Italy with Ben, while Ashley delivers the message that Anne and David are engaged. Grace tells Tom and Adrian that George told her that he lied about the vasectomy, and the secret flies around the school, only to arrive at Amy, who asks Ashley if George told the truth. Meanwhile, when Ricky asks Leo for a raise, Leo gives Ricky the apartment above the butchershop and the raise, and David asks Anne to move into their own home.

Amy refuses to let Ben come over to say goodbye to her and John for the summer, but instead allows Ricky to take John to his new appartment. Marc Molina, the school guidance counselor, resigns at the end of the school year, while Anne starts pushing the divorce after she decides to accept David's marriage proposal. At the same time, Ashley reaches a breaking point urging George to tell Anne that the baby is his and Grace gets accepted into a medical school for the summer. Upon packing, Ben confronts Leo about Betty, but Leo reassures Ben that he trusts her. Meanwhile, Ricky is at Amy's house picking up John for the night, and Ben comes over to say goodbye to Amy. Ricky walks in on Ben and Amy kissing, but Ben gets angry and leaves.

Everyone has returned from summer vacation, and George tells Anne a big revelation.

Adrian makes an attempt to get George and Anne reconciled, but only for her own selfish reasons.

Adrian and Amy's fighting escalates and Ricky intervenes.

Amy attempts to keep Ben's attention. Meanwhile, Grace makes an impression on Adrian.

Amy is jealous when Ashley gets her own room in the garage, while Ricky pursues Adrian but she claims to have moved on.

George gives Ricky and Ben some much needed advice. Ricky and Adrienne go to couples therapy and Adrienne shares a very personal story explaining why she wants commitment so badly. Grace continues to argue with her mom over dating so soon and decides she isn't ready for a serious relationship herself. When Anne goes into labor they come to the conclusion that they won't make it to the hospital in time so George, Amy, and Ashley are forced to deliver the baby at home. Adrienne and Ricky spend the night together and Ricky finally says the words Adrienne has been waiting to hear. Meanwhile, back at the Jeurgens household George comes to a shocking discovery about the baby.

Most of the gang ditch classes and are pursued by the new school counselor; Amy and Anne take a mother/daughter vacation.

Anne encounters an old flame causing Amy to be attracted to his son.

Relationships are on edge, with Ben and Amy dealing with their own relationship drama, as well as Adrian and Ricky and Grace and Jack.

Grace's love of self-love comes out at school in the form of a campaign called "Just Say Me". Which has girls all across school abandoning sex with guys in favor of a more personal activity that has the same end result.

Meanwhile, Adrian's own campaign of trying to be Amy's friend bears fruit when Amy invites her over for a visit.

Amy goes on a date with Jimmy. Meanwhile, Ashley pursuades George to vist Anne to rekindle their relationship, and Griffin sends his cousin Grant to get to know Ashley. Ben visits Grace and tells her that he wants to be friends, and as he leaves, they kiss. At the same time, Amy and Jimmy kiss. After George knocks on Anne's appartment door, Josh answers and explains Anne is with Mimsy and might come back home. While Ricky encourages Amy not to get caught up with Ben and Grace, Adrain's parents tell her they will get married, therefore causing her mom not to take the job offer in New York. Anne tells Ashely that she doesn't think it would be good for her to return home.

Amy fears that Jimmy's standoffish behavior is a result of her bad kissing, so Ricky offers to help her practice, which ends up being a bad idea. Elsewhere, Adrian's parents are planning a quiet, low-key wedding at home, and Ricky is hesitant to introduce everyone to his foster parents. A mother-daughter dance is being planned at school, but most of the students have strained relationships with their moms at the moment. Lastly, Ben must decide whether to continue pursuing Grace, and Anne suggests therapy as a final attempt for her and George to keep their family together.

Amy visits Jimmy to learn why he never called her; Adrian makes a confession to Ricky.

Ricky takes time to track down his biological mother and confront her about his abusive childhood. Elsewhere, George wants to modernize his look by getting a makeover. Things are still tense between Adrian and Grace, and Jack breaks up with Madison after learning something about her. Also, Amy has a meltdown after a run-in with Ben, who is still trying to decide if he really wants her back.

Ricky, Ben, Amy and Adrian attempt to work out differences.

A messy custody battle ensues as Amy and Ricky continue to disagree over their rights as John's parents. Still angry with Ricky for breaking up with her, Adrian sides with Amy and encourages several of their friends to do the same. Elsewhere, George grows more frustrated with Anne's refusal to get re-married right away. Ben and Grace get closer, and Ashley feels ready to make some changes in her life.

Mimsy returns, and a wedding is held.