Anne wants Amy to join her in looking for jobs. Thomas gets Ashley to invite him for a visit. Grace gets an idea on how Adrian can lure her step-brother to have sex with her. Jack is selling candy bars. For real.
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.
Adrian tells Ben that she's not pregnant, much to his relief, but he questions whether she's telling the truth. Unbeknownst to Anne, George takes Ashley to the doctor to discuss birth control options. Jack's parents are moving out of town for a new job and give him the option to stay with a friend while he finishes school. Amy is confused about why Ben is avoiding her after he professed his love to her, and Ricky takes an interest in Ashley.
Though Ben and Amy are excited to be back together, Amy weighs an opportunity to study music over the summer in New York, but has to juggle her responsibilities as a mother, and Ben is still uncertain if Adrian has been honest with him. Meanwhile, Ashley skips school to help comfort Adrian through bouts of morning sickness, and Ricky, who overhears that Adrian might be pregnant, goes to confront her about it. And Jack is desperately trying to find someone to stay with so that his parents can move away.
Amy, still unaware that Adrian is pregnant, is off to New York for the summer, and she and Ben profess their love at the airport. In the early morning hours, Ben goes to Ricky's apartment for advice on Adrian, and finds that Ricky has a new love interest. Adrian looks to her mother for guidance, who talks about her own experience as a teen mother and offers her support for whatever Adrian decides. George is worried about Amy being alone in New York, and about Ricky moving into Amy's room while she's gone to help care for John, putting Ricky and Ashley under one roof. Ruben and Cindy realize they are at odds over Adrian's decision. And Adrian receives a surprise proposal.
With Amy away in New York at music camp, a ridiculous rumor that she is pregnant again spreads through school. Adrian has decided she does not want to keep the baby, but her parents argue over whose choice that should be. Jack moves into the Bowmans' guest house with Tom, and Ricky is living with the Juergens to help with John. Ashley and Ricky share an intimate moment.
Amy's back from New York and asks Ricky to spend the night (platonically). Ben and Adrian discuss the possibility of having sex again but talk of their exes soon intervenes. Meanwhile Grant overhears Jack and Jesse discussing Jack's continued feelings for Grace. Across town Alice and Henry share a bed while waiting for Ben to return home. Ricky and Amy agree to a date.
Ashley shows up in Ricky's bed telling him that she wants to get "it" over with and for it to be with him. Ben finds out the value of the ring that he gave to Adrian and decides to earn enough money to buy it. George and Anne reconsider getting remarried. Amy & Ben finally have their first long talk since her return from New York. Grace's mother gets Grant to commit to a promise that Grace doesn't agree with. Ricky, Amy & John have their first real date.
Returning to school after the summer break, Ben and Adrian go to find out the sex of their baby. Amy tells Ricky that she is ready to take the next step in their relationship, but only if he first agrees to be tested for STDs.
When the high school guidance counselor shows up at their home, George and Ashley learn a bit about home-schooling. Ricky's mom gets out on parole and needs a place to stay. When Grant suggests that Grace get tested for STD's and Jack agrees, Grace reacts badly. Amy checks up with Lauren following her break-up. Ben is eager to have Adrian move in with him and perhaps even tie the knot.
Adrian's pregnancy hormones mix with her dreams of a big wedding and the results are scary for all involved. While Amy is incensed, Ben tries to go along with it all but is confronted first by Ricky and then by the parentals with a proposal of their own. Meanwhile Amy returns home and presents Ricky with a proposition as well.
Ashley's upset that Amy and Ricky are moving in together. Grant and Grace are enjoying their decision to have sex. Amy has a conversation with Adrian and soon the entire gang is getting competitive over sex. Ricky has a talk with Ben and suggest that they both "be men" and be honest with their significant others.
A problem with the guest list for Adrian's shower reignites the Amy/Adrian feud and tempers flare to new heights. The entire crew seems to get pulled into the dispute no matter how unwilling and things get said that may end friendships and relationships forever.
In a moment of panic, Ben admits to Amy that he's not ready to be a husband and father at 17. Betty hears about a family crisis and must miss Ben's wedding. Jack's dad comes back to town to officiate at the wedding and suggests that Jack should break up with Madison if she's only his second choice.
Jack & Madison have sex for the first time at Ricky's place and now both have regrets. Amy hears about their tryst and gets upset with Ricky for lending the place out and for the amount of usage Ricky's bed has seen. Ricky's mom gives him some advice on romance. Meanwhile Ben & Adrian begin their married life together with a surprise reception at school. When Jack approaches Grant for some relationship advice, Grant and Grace discuss their continuing relationships with their exes.
Adrian is mourning the loss of the baby. Ashley and Toby are driving cross country. When Amy moves in with Ricky, George considers some home remodeling. Ricky gives Ben some advice about the situation with Adrian.
When John runs a slight fever, Ricky and Amy argue over whether or not John needs to go to the emergency room. George tells Ashley that she must get a job if she's going to stay in Florida. Ben and his dad disagree about whether Ben should end his marriage.
Henry and Alice's break-up has them fighting over custody of Ben's friendship. Adrian decides that she needs one last kiss from Ricky to resolve her feelings for him. Jack asks Grace to help him write the invocation for graduation but it's primarily a ploy to spend time with her. Ricky delivers the valedictory graduation speech but adds a surprise finish.
Ben asks Dylan, the girl he met at the party out on a date but cancels when he hears that Adrian slept with Henry. Grace tries to figure out what she still feels for Jack after kissing him at the party. Ricky is surprised that Amy's in no hurry to get married after accepting his proposal. Adrian tries to contact Omar to patch things up.
Amy suggests the 4th of July for a tentative wedding date and the texting grapevine spreads the news. Jack is still hoping to rekindle his relationship with Grace. George thinks his ex-wife Anne might be gay. Ben's new girl gang pressure him into resuming his friendship with Henry.
Rumors about Anne (and Amy) being gay go wild. Ben asks his dad about going to an exclusive private school his senior year. Grace makes an embarrassing admission about a fantasy to Adrian and then goes overboard to disprove it.
Anne and Ashley are home from their trip and Anne is pissed that George started the silly gay rumor. Grace is still reeling from her experimental kiss with Adrian (and liking it). Adrian's mom cautions her that folks in the LGBTQ community may not like her grabbing attention by exploiting what to them is a serious question. At the urging of his new girlfriend, Ben charges a $1200 school application fee to his credit card despite his dad having vetoed Ben's changing schools.
On the last day of summer school, Amy and Ricky elope, leaving John with Amy's dad. Dylan and Ben's after hours visit to Dylan's private school is followed by a school fire and Ben's Dad overhears him discussing it on the phone. Anne is feeling out of touch in Palm Springs after her coming out and no one is returning her calls. George catches Ashley and Toby in bed together.
The three mothers (Nora, Anne and Margaret) are all waiting for Ricky and Amy to return home to pick up John. All suspect that Amy and Ricky have eloped. Meanwhile Ben faints while visiting with Adrian's father. Ben's father is pursuing an investigation of his own.
Amy and Ricky struggle with the decision to pretend to be married. Ben visits Adrian's dad for help with his situation. Meanwhile Ann, Nora, Ricky's parents and Lauren and Madison are planning a wedding party for Amy and Ricky.
Amy and Ricky continue planning their wedding, so Amy buys her dress - at a thrift store. The dress is a little worse for wear - but only Amy sees the potential to make it great. Meanwhile, Ricky is upset about the dress and Adrian thinks the dress reflects her feelings about getting married. Kathy is conflicted about going back home after having the baby, and Ethan begs his parents to let him fly to Texas with her to ask Kathy's parents if she can stay. Jack is still recovering and is in love with Grace. George tells Anne about seeing David with biological children, which makes her question Robie's paternity. And George and Kathleen run into guest star, Chaz Bono (playing himself), at a restaurant where they are discussing whether Robie is George or David's child.
Ben is in a euphoric mood, while driving Ethan to the airport he has an epiphany that Amy may not have been his first love. Omar leaves his student teaching job and proposes to Adrian. Ethan pleads with Kathy's parents to let her return home with him. Ricky confides in Dr. Fields about Amy's lack of enthusiasm towards their marriage - and Amy confides in Dr. Fields that she has other hopes and dreams. Meanwhile, Jack is restless with his injuries and enlists Grace's help. And, George meets with David to discuss Robie's paternity.
Anne is furious with George for lying about Robie's paternity and calls off Amy and Ricky's wedding, inadvertently revealing the truth about their non-marriage. Jack refuses to get help as he struggles to come to terms with everything he's been through. Nora encourages George to work things out with Anne. Meanwhile, Ethan is not happy when Kathy and Chloe become friends.
George and Reverend Stone insist that Jack see a therapist, but it's Adrian's advice that ultimately persuades him to go. Ricky feels Amy's absence as he juggles taking care of John with his work and school responsibilities. Cathy is stunned when she learns that her ex-boyfriend wants to see their baby. Amy realizes that she doesn't want to lose Ricky. Meanwhile, Leo secures an important business account.
Ricky tries to find a way to support Amy's dream of going to Hudson University, despite everyone's reservations about their relationship. Amy worries about her future when her meeting with the college counselor doesn't go quite like she'd expected. Adrian is furious when Omar asks her to move to New York. Jack considers suing the university for failing to prevent his attack. Meanwhile, Ethan is determined to learn the real reason Don is in town.
Ethan is convinced no adult actually uses algebra, but a chance meeting with Danica McKellar helps him look at math in a different light. Amy's frantic search for her missing wedding bands leads her to Ben, who advises her to break-up with Ricky before it's too late. George and Kathleen's romantic dinner is interrupted by an uninvited guest. Meanwhile, Mrs. Stone confronts Grace about her relationship with Jack.
Amy and Ricky announce they will get married the day after Amy graduates from high school, but everyone is skeptical that the wedding will actually happen. Grace and Jack announce their engagement, but it's soon clear that Grace is having second thoughts about her decision. George and Kathleen are distracted from their secret plans when their mothers arrive for unexpected visits, but they eventually include their families in a special surprise. Meanwhile, Ethan is jealous when Kathy agrees to help Brian prepare for the spelling bee.
Amy, Adrian and Grace struggle to reconcile their pending marriages with their individual dreams. Anne begins to feel like an outsider in her own family but soon finds an unexpected ally in Kathleen. Kathy and Ethan get into a fight after Ethan questions the status of their relationship. Leo worries about Ben's obsession with Amy. Meanwhile, Chloe reconnects with someone from her past.
Adrian is devastated by Omar's decision and takes her pain out on Ricky and Jack. Ben refuses to give up on his dream of reuniting with Amy and makes a shocking confession to Alice. Ethan and Margaret have an honest conversation about his relationship with Kathy. Meanwhile, Clementine returns to town and pays Ricky a visit.