Kailyn comes face to face with Javi's pregnant girlfriend; Chelsea prepares Aubree for her first visit with Adam at the center; Briana tells DeVoin to move out; Leah has a new boyfriend; Jenelle and Nathan square off in court.

Jenelle is upset when Jace's father unexpectedly reaches out, Chelsea wonders if Adam can get it together for visitations with Aubree, and Isaac visits Javi's house.

Chelsea may go into early labor; Jenelle faces Hurricane Florence and makes an emergency call about her husband; Kailyn's birthday party for Lux pushes her to reconnect with estranged family; Devoin and Nova get closer.

Jenelle addresses rumors spurred by the 911 call; Kailyn's sister shares major news when they reconnect in Dallas; Briana visits a new beau in New York; Leah takes Ali to another important doctor's appointment in Columbus.

Chelsea finally meets her new baby girl; Jenelle avoids filming, causing concern; Kailyn tries to maintain a long-distance relationship with her sister; Briana's new flame visits Florida for some camping.

Stella needs emergency surgery; Leah approaches her breaking point with Jeremy over Addie; Chelsea and Cole bring Layne home; Jenelle struggles with David's absence on the show; Kailyn starts planning her sister's baby shower.

Chelsea receives surprising news about Adam's other daughter; Briana takes initiative and files for child support from Luis; Jo drops a child support bomb on Kailyn; Jenelle and Nathan's court hearing is postponed.

Jenelle needs emergency surgery; Briana confronts Luis in New York; Kail and Jo come face-to-face for the first time since he filed for child support; Leah tells Jeremy he needs to spend more time with Addie.

Barb plans her trip to meet with Jace's dad, causing Jenelle anxiety; impressed with DeVoin's improvement, Briana considers making a big change; Chelsea plans one-on-one time with Aubree; Kailyn is upset when Javi calls her out.

Barbara flies to New York to meet with Jace's dad; Adam's parents break the rules of their custody agreement with Chelsea; Lux's dad surprises Kailyn at Lincoln's birthday party after a big fight; Briana takes a family trip.

Lincoln gets a new brother; Kail offers Jenelle a peace offering, but her good deed backfires; Chelsea is forced to confront Adam's parents about continuing their visits with Aubree; Leah receives an update on Ali's vision.

Kail launches her haircare line with a big party in NYC, and a few surprise guests show up. Things don’t go well for Luis when Briana lets him see Stella. Chelsea struggles with the stress of managing three kids.

Kail gets a surprising call from Jo’s wife about their child support battle. Nathan and Jenelle go back to court, with a surprising turn. Chelsea throws Aubree a belated birthday celebration.

Barb and Jenelle have a wild weekend in Atlanta, but things go too far when she brings up another cast member. Kail and Jo celebrate Isaac's birthday together. Briana visits John for his. Leah considers new birth control

Leah's girls reveal their true feelings about Jason. Chelsea takes a family vacation, but comes home to a shocking find. Jenelle tries to defend her family on social media, but things blow up when another cast member gets involved.

Leah breaks up with Jason. Jenelle's plans to take Jace on a mother-son trip go awry. Briana leaves Luis alone with Stella for the first time. Kailyn gets child support advice from TMOG's Amber. Chelsea tends to a sick Watson.

Chelsea suffers a panic attack; Jenelle visits Briana in Orlando but struggles to film without her husband; Addie is confused about Leah and Jeremy's relationship; Kail finalizes child support with Jo and moves on.

Leah and Jeremy rush Addie to the ER; Jenelle questions her future with the show; Briana lets DeVoin take a major step forward with Nova; Chelsea debates how to treat her anxiety.

Jade joins the cast but trust issues threaten an important anniversary with Sean; Briana allows Devoin to take Nova for the weekend; Leah and Jeremy get flirty in New York.

Briana confronts Devoin in New York; Jade tries to smooth things over with Sean before moving into their new house; Leah and Kailyn vacation together in Costa Rica; Chelsea and Cole consider a new opportunity.

Leah faces another health scare with Addie; Jade and Sean reach a boiling point, forcing her to move out; Briana is torn when she gets a suspicious message about John; Adam surprises Aubree; Lux's father puts Kailyn in a difficult situation.

Sean refuses to let Jade get her things from their house, so she goes to the police. Leah gets some shocking news about her sister. Javi and Lauren are rocked by an on-camera revelation from Kailyn. Briana and John visit the Dominican Republic.

When Nova misses her dad, Briana puts her anger with DeVoin aside. Jade tries to distance herself from Sean but worries how it will affect Kloie. Leah’s kids become suspicious of her possible romance with Jeremy. Kailyn reconsiders a move.

Sean pleads with Jade to let him see Kloie; Jo throws a wrench into Kailyn's vacation plans; Leah considers what the Hawaii trip could mean for her and Jeremy; Briana wants to take her relationship with John to the next level.

Gracie reveals some deep feelings about Jeremy to Leah while on vacation in Hawaii. Briana celebrates Stella's second birthday, but leaves someone off the guest list. Jade worries her mom is slipping back into old habits.