Unexpected

McKayla is back, and she's having another baby! Chloe worries that Max may go to jail. Hailey is looking forward to meeting Matthew's sister. Tyra and Alex get a closer look at their baby.

Chloe has to miss school because Ava has pink eye. Tyra worries she's losing friends because of her pregnancy. Hailey finally meets Matthew's sister at a birthing class gone awry. McKayla and Caelan have an argument.

Chloe worries that Max might start trouble at Ava's baptism. Tyra is in the hospital and ready to have her baby. Matthew has been texting with Hailey's best friend, and Rilah gets upset when her mother moves the family.

Things get scary when Tyra tries to induce. Hailey is depressed when Matthew goes MIA. Anthony's family is concerned he isn't the father of Rilah's baby. Caelan doesn't believe that McKayla is actually in labor.

Tyra and Alex experience parenthood for the first time. Chloe isn't sure she can stay with Max. Anthony questions the paternity of Rilah's baby. A dinner with McKayla and Caelan's families goes left.

Anthony looks to prove paternity at Rilah's 4D ultrasound. Max reveals more about his addiction when he meets with a therapist. Matthew visits Hailey's house to build a crib. Tyra and Alex leave the hospital.

Chloe keeps apartment hunting with Max from her parents. Hailey worries what it means if the "other Hailey" skips her baby shower. McKayla moves out of the house she once shared with Caelan. Rilah's mother gets real with Anthony.

Rosa and Rebecca finally meet at Rilah's baby shower. Tyra isn't comfortable visiting Alex's family with Alex and the baby. McKayla goes to the hospital to be induced. Jessica and Nate find out Chloe and Max broke their only rule.

Shelly meets her granddaughter, despite McKayla's wishes she stay away. Amidst tension with Alex's family, Tyra reconnects with some old friends. Hailey begins to fear childbirth, and Chloe gets ready for the prom.

Hailey and Matthew bring their baby home. Max fails a drug test and is sent to rehab, but he assures Chloe he won't miss prom. Alex is worried about moving in with Tyra's family, and Rosa takes Rilah to the hospital.

Anthony starts to think more seriously about his relationship with Rilah. Alex tells his grandmother he's moving out... but immediately has second thoughts. The rehab has a bed for Max... but the timing isn't great. McKayla starts her post-Caelan life.

Chloe gets ready to go to prom without Max. Caelan and Shelly meet with an attorney and plan on taking McKayla to court. Tyra and her family pack up their old house, while Alex feels caught between Tyra and his grandmother.

Despite the baby being in distress and her blood pressure spiking, Rilah gives birth to her daughter. Caelan records a song he wrote about McKayla, and Max comes home from rehab in time to see Chloe graduate.

The teenage moms, and their mothers, all meet for the first time. They discuss childbirth, parenthood and the ways in which their mother-daughter relationship has changed.

The teen couples all take the stage together to give perspective on each other's stories this season, and they are joined by their babies.