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 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 fait une crise d'angoisse. Jenelle rend visite à Briana à Orlando sans David. Addie est perturbée par les rapports entre Leah et Jeremy. Kail se lance dans un nouveau projet.

Addie est conduite aux urgences. Jenelle s'interroge sur son avenir dans la série. Devoin et Nova font un grand pas en avant. Chelsea cherche un traitement contre le stress. Tout va bien pour Kailyn.

Jade rejoint 17 ans et Maman! Sean et elle doivent fêter leurs 4 ans de couple mais une dispute éclate. Devoin garde Nova tout le week-end mais il déçoit Briana. Leah et Jeremy se rapprochent.

Briana dit ses 4 vérités à Devoin. Jade fait tout pour apaiser les tensions avec Sean avant d'emménager avec lui. Leah et Kailyn partent au Costa Rica. Chelsea et Cole considèrent l'achat d'un bien. Briana dit ses 4 vérités à Devoin tandis que Jade fait tout pour apaiser les tensions avec Sean avant d'emménager avec lui. Leah et Kailyn partent au Costa Rica et Chelsea et Cole considèrent l'achat d'un bien...

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 implore Jade de le laisser voir Kloie. Jo contrarie le projet de vacances de Kailyn. Leah se demande l'impact qu'aura Hawaï sur sa relation avec Jeremy. Briana veut aller plus loin avec John.

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.

La relation de Jade avec sa mère se détériore. Briana rend visite à John. Ali se rend à un camp pour enfants atteints de dystrophie musculaire. Kail fête l'anniversaire de Lux. Dans la saison 9 de 17 Ans et maman, on explore des territoires inconnus. Les mamans ont de nouveaux hommes dans leur vie et des papas divorcés reviennent sur le devant de la scène. Cette saison prouve que l'émission n'a rien perdu de sa superbe.

Les parents de Jade se font arrêter. Devoin veut prouver à Briana qu'il n'est pas une menace pour Nova. Ali rentre. Chelsea et Layne fêtent leur anniversaire. Kailyn fait un investissement. Les parents de Jade se retrouvent en prison et la supplient de payer leur caution. Devoin vient soutenir Nova le jour de sa rentrée. Leah va chercher Ali à son camp d'été. Chelsea fête son anniversaire avec Layne et Kailyn fait un achat de taille...

Briana makes a major decision, leaving John sidelined. With her parents still in jail, Jade reaches to Sean for support. Chelsea’s anxiety rises with the launch of her clothing design. Kailyn has a big surprise for the boys. Leah's girls start school.

Chelsea celebrates Aubrey's 10th birthday; Leah and Jeremy plan a night alone but things don't go as expected; Kailyn gets heartbreaking news about a family member; Luis asks to borrow money from Briana.

Kailyn and her boys say goodbye to the family dog. Jade takes Sean in with surprising results. Briana confronts John about their deteriorating relationship. Chelsea gets a shocking request from Adam's mom. Leah is reminded of her past with Jeremy.