Surprise pregnancies turn 3 couples' lives upside down. Krystal and Jarrel argue over their baby's paternity until Krystal goes into labor. Aly and Josh uproot their lives to grow their family. Doug and Mars are still volatile even though their baby is now 2.

Jarrel won't talk custody with Krystal without a DNA test. Aly's allergic reaction during labor makes her high-risk pregnancy more dangerous. The quads are back and busting out of their house. Brooke, a pregnant wrestler, is terrified of giving birth.

As Aly and Josh's surrogate birth mom goes into labor, they worry she'll have difficulty giving up the baby. Jarrel does a paternity test on 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 on the day 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 if they should 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's Weston's new office space. Ashley and Tyson's move has them scrambling to make money at a big expo.

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 breastmilk in a bar. In order to make money, Ashley and Tyson have to send the quads home.

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 to see if she can wrestle again. Mars and Doug go to counseling to save the relationship before Mars' ultimatum expires. Aly approaches a crucial milestone in her cancer 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 her diagnosis. The Gardners make a decision about their house. Mars gets an answer to her ultimatum.