Javi blows up over something he finds on Kailyn's phone. Chelsea is shocked when Adam requests 50/ 50 custody of Aubree. With her marriage to Jeremy on the rocks, Leah has to face Corey in court for custody of their daughters. Jenelle decides to legally pursue full custody of Jace.

Leah is forced to take a court-ordered drug test. Chelsea joins forces with Adam's ex, Taylor, to fight his custody request. Kailyn and Javi's issues boil over when she spends a night away with friends.

Chelsea and Adam lawyer up for their custody battle. Jenelle and Nathan's explosive arguing threatens her chance of gaining custody of Jace. Corey presses for more time with the girls, while Leah and Jeremy's marriage crumbles.

Despite efforts to get along, Leah and Corey's co-parenting relationship takes a turn for the worse. Barbara and Jace visit Jenelle for the first time in weeks. Kailyn and Javi seriously discuss the future of their marriage.

Chelsea hears worrisome news about Taylor that could affect her court case with Adam. When Jeremy threatens divorce, Leah begins to unravels. Nathan's suspicious behavior forces Jenelle to rethink their engagement. Kailyn and Javi's fighting has an accidental result.

Nathan is arrested following an altercation with Jenelle. Leah is served with divorce papers. Chelsea and Adam face each other in court. Kailyn takes a birthday vacation.

Jenelle pleads with Nathan to stay together. Kailyn fears that Jo's move is too close for comfort. Leah, who's overwhelmed by a looming divorce and custody threats, makes a big decision.

Corey's threats force Leah to return from therapy. Jenelle and Nathan struggle to co-parent through their broken relationship. Kailyn and Javi must adjust to Jo and Vee living so close. Chelsea celebrates Aubree's preschool graduation.

Kailyn is torn between Javi and Jo. Leah finalizes her divorce with Jeremy and prepares to return to therapy. Jenelle and Barbara meet in court to discuss custody of Jace. Chelsea gets frustrated when Aubree's behavior takes a turn for the worse.

Jenelle faces felony charges after a fight with Nathan and his new girl. Chelsea notices Adam's actions are really affecting Aubree. Kailyn loses it when Jo goes MIA. Leah ends her marriage while Corey and Miranda make a big announcement about theirs.

Jo is upset by Kailyn's threats of legal action. Leah returns from treatment. Jenelle faces the consequences for her behavior.

Kailyn and Jo reveal some surprising news about their child support battle. Jenelle's deep issues with Nathan finally erupt and an explosive argument with Barbara sends her storming off stage. Hosted by Dr. Drew.

Chelsea dismisses Adam's argument to get more time with Aubree and Adam reveals his true feelings about Cole. Leah opens up about her treatment and hashes things out with Corey and Miranda, which exposes a deep secret from their past. Hosted by Dr. Drew.

Nessa and the moms dish on never-before-seen moments and give viewers some special behind the scenes look at the past season.