The Valley, It's my Birthday & I'll Cry if I Want to

It may be the end of summer but things are heating up in the Valley. Danny and Nia juggle four under four, while Kristen and Luke don't see eye-to-eye as they transition to first-time parenthood.

Lala invites most of the group to celebrate her daughter Sosa's first birthday, leaving some feeling excluded. Janet tries to make amends with a few members of the group. Tom and Michelle's bond continues to grow.

Brittany takes the first step toward regaining her self-confidence with a mommy makeover consultation. Jasmine's growing friendship with Lala is tested on a girls' night out, leaving Michelle in the middle.

Danny and Nia continue to struggle with their newborn daughter refusing a bottle. As Kristen grapples with postpartum blues, her relationship with Luke is tested when their first date night out without Kaia turns into a disaster.

Janet's game night olive branch yields mixed results. Jesse gives Lacy a divorce update in hopes of taking things to the next level. Kristen and Luke continue to struggle with their communication.

Tom introduces his crush, Kiana, to his friends. The group takes a train to San Diego and Janet tries to build a stronger friendship with Zack. Danny starts to lose his patience with Nia. Kristen and Luke struggle on their first trip as new parents.

The San Diego trip continues with Lacy's arrival, which causes chaos, particularly with Michelle. Kristen struggles to quell her postpartum frustration towards Luke. The group holds a drag pageant. Danny and Nia's relationship is put to the test.

Nia struggles to deal with Danny's antics during a drag pageant. Jason suffers a traumatic injury. Lala questions why Kristen blindly takes up for the Bookos.

Kristen and Luke work to reconnect. Michelle opens up to Lala about the financial strain of her impending divorce and emotions run high when she surprises Jesse with divorce papers to sign.

Zack's roommate moves out, leaving an empty apartment for him and Benji to see what living together could be like. While Brittany recovers from her mommy makeover at home, red flags start to arise with her new boyfriend, Brandon.

Zack invites everyone on a getaway to Mexico, giving some frenemies pause. Brittany drops shocking news about Brandon.

Zack breaks down about his future with Benji. Benji pokes a hole in Danny's story. Brittany calls out Kristen for protecting Nia's feelings over hers. On a group trip to Mexico, Kristen's travel anxiety gets the best of her.

Schwartz's birthday party erupts into chaos after Lala calls out Danny's social media behavior. Zack's temper flares over the group's treatment of Danny.

Kristen is accused of throwing her best friends under the bus. Tension builds between Danny and Nia while out with the group for Zack's birthday. Michelle struggles watching Jesse be affectionate with Lacy. Zack ends up in the emergency room.

Michelle and Lacy get emotional as they attempt to move forward. Jesse reveals a secret to Kristen about her future with Luke. Janet opens up to Lala about her past. Tensions hit a high at Danny's birthday dinner.

Lala celebrates her 7-year sober anniversary while also dealing with the passing of her dog, Lily. Kristen and Luke struggle with the aftermath of Mexico and what's next for their relationship.