Fifteen-year-old Lexus thinks she's in labor and heads to the hospital. As a pregnant 16-year-old, McKayla finds prom dress shopping nearly impossible. Sixteen-year-old Lilly's family gets to know the father of her baby.

Driving home from Lexus' false labor, Kelsey realizes the parents-to-be aren't prepared. Lilly and her mom are upset when James bails on birthing class, and tension between her mom and Caelen's mom makes McKayla uncomfortable.

Lexus finally gives birth. After getting ditched yet again by James, pregnant Lilly receives some tough love from her mother. Tensions between McKayla's mother and Caelen's mother finally erupt.

Lilly's mom doesn't want the baby to have James' last name. Two weeks before her own due date, McKayla visits her newborn sister. Lexus and Shayden grapple with raising a newborn, and one of the teen girls is given a ring.

McKayla is forced to choose sides when she must decide whom she wants in the delivery room. James learns some shocking facts about childbirth from his sister, and the stresses of the newborn baby tear Lexus and her mother apart.

McKayla's baby's name is met with lots of tears. Shayden struggles with Kelsey's rules, and Lexus feels her mom is pushing her away. Lilly gets more than she bargained for when she tries to induce labor.

For the first time, the families come together for the Unexpected: Tell All. The parents, grandparents and great-grandparents share insight into their stories and updates on what has happened since the cameras stopped rolling.