Autumn and Matthew face a challenge bigger than raising a baby on their tiny boat; Jamielynn wants boyfriend Matt to stop behaving like he's single; Aly and Josh endure a parent's worst nightmare.
Autumn and Matthew try to set aside differences for the sake of their baby; after three miscarriages, Julia and Ryan pray she can carry triplets to term; Matt shocks Jamielynn with career news; Aly struggles with a side effect from her past cancer.
An unexpected turn complicates Julia's pregnancy with the triplets; Jamielynn's water breaks weeks early; Mariah and Raymond, together nine months, meet each other's families for the first time; Autumn's mom worries about the baby living on the boat.
Jamielynn juggles caring for a newborn and toddler alone when Matt returns to work; overdue Autumn tries everything to avoid being induced; Julia and Ryan navigate NICU life; as Mariah's due date approaches, her fear of childbirth grows.
Aly and Josh take the toddlers on a family road trip; Julia and Ryan bring home one of their triplets.
Mariah and Raymond's baby bliss is cut short when Raymond expresses doubts; the triplets' medical issues haunt Julia even after they've been released from NICU; Autumn's labor brings her and Matthew closer; Matt confronts Jamielynn for seeing his ex.
Autumn and Matthew bring their baby home to their boat and an uncertain future; things blow up between Raymond and Mariah's mother; an overwhelmed Julia may need help caring for the triplets; Matt and Jamielynn discuss deployment.
When Mariah and Raymond apartment hunt, a bigger issue is brought up; Julia faces an emotional rollercoaster when she leaves the triplets at home to return to work; Autumn and Matthew turn to therapy to help them co-parent.
The Sadler triplets are out of the woods and free to meet the world; Autumn and Matthew say goodbye to the boat and try to figure out how to co-parent; Mariah and Raymond finally leave Barb's house; Matt makes a decision on proposing to Jamielynn.
Surprise pregnancies turn three couples' lives upside down; Krystal and Jarrel argue over their baby's paternity until Krystal goes into labor; Aly and Josh uproot their lives; Doug and Mars remain volatile two years after their baby's birth.
As Aly and Josh's surrogate goes into labor, they worry she'll have difficulty giving up the baby; Jarrel does a paternity test in Boston without telling Krystal; Brooke goes into labor three weeks early; Mars gives Doug an ultimatum.
Aly and Josh get difficult news from the birth mom of the baby they're adopting; Jarrel gets results of the DNA test; Brooke has a scare with the baby when she brings him home from the hospital; Tyson is left alone with the quads for the first time.
Aly and Josh pray that their birth mom will change her mind; Brooke takes steps to return to pro wrestling after Weston quits his job; Ashley and Tyson stress as they decide whether to build a house; a shocked Mars thinks she might be pregnant.
Mars gets her pregnancy test results; Krystal has second thoughts about Jarrel bringing their baby to meet his friends; Brooke gets concerned when she sees Weston's new office space; Ashley and Tyson's move has them scrambling to make money.
Mars and Doug have a blowout after she meets his ex-wife; Aly and Josh have a scare when they return home; on her first night out since the birth, Brooke has to pump breast milk in a bar; to make money, Ashley and Tyson have to send the quads home.
A furious Jarrel decides he is done with Krystal for good; Aly and Josh adjust to their new life at home with three babies; Brooke gets a tryout with her old wrestling bosses; Mars turns the tables on Doug and gets the attention of another man.
Brooke gets back in the ring; Mars and Doug go to counseling to try and save the relationship; Aly approaches a crucial milestone in her recovery; the quads visit the doctor who delivered them.
Two parents get surprises that change their lives; Brooke has her first wrestling match as a mom; Krystal relies on a father figure for Boston; Aly gets a diagnosis; the Gardners make a decision about the house; Mars gets an answer to her ultimatum.
Ashley and Tyson await their quadruplets' birth; Doug and Mars race to the hospital for early labor; type-A couple Kristina and Jason craft a meticulous birth plan, but don't know how they will work while raising a baby.
Ashley gives birth to quadruplets 12 weeks early; unprepared Mars and Doug struggle with their new roles; Kristina is torn between working and caring for her baby; Destiny and Sal have fiery, battling families.
Tyson returns to work, leaving Ashley to care for all four babies on her own; Destiny spars with Sal's parents about baptism; to save their relationship, Doug and Mars try couples therapy; Kristina and Jason struggle to expand their business.
Destiny interviews nannies despite objections from her family; chaos erupts when Ashley takes on a photo shoot without Tyson; Kristina considers putting Lincoln in daycare; Doug heads to Florida after a fight with Mars.
Ashley and Tyson celebrate the girls' first birthday with an emotional trip; Doug finds Mars and pleads for forgiveness; Sal and Destiny struggle to separate from their overbearing moms; Kristina chooses between work and family.