When the siblings react to Amy's proposal, relationships are fractured.

Tammy addresses Amy about her weight gain and the family heads to Pittsburgh for Tammy's skin removal surgery.

Amy reels emotionally and physically from her camel bite and arrest. Chris explores a passion project, and Tammy expands her circle and fulfills a childhood dream.

Tammy takes a big step forward in her relationship with Andrea.

Tammy's skin removal surgery is still up in the air as she struggles to kick bad habits. Amy's got a new roommate and a new man. Chris' plays referee between Brittany and their new neighbor. Tammy is keeping a secret from her family.

Tammy gets a push to reveal her personal life to her family. Amy's life gets even more chaotic, pushing her to make a rash decision. Chris and his wife make a big decision about her health.

A missing tool in the operating room causes delays to Tammy's extreme skin removal and Amy decides she's had enough and makes a bold move.

As Tammy heads home after 14 months in rehab, she's forced to make the most difficult decision of her life. Fed up with not having help, Amy feels her marriage is starting to unravel. Amanda and Misty reveal they're getting bariatric surgery.

Tammy reveals to her sisters that she's dating a woman and their reaction surprises her. Chris and Tammy check-in on their skin removal progress, and a harrowing moment at the petting zoo sees Amy's life turned upside down.

After the blowout with Michael, Amy makes the hardest decision of her life; Chris and Tammy have a long-overdue appointment with Dr. Smith; worried about surgery, Amanda and Misty do a last-minute cleanse to sweat out nicotine.

Amy sees a paediatric dietitian and faces some difficult truths about Gage's diet. Dr. Smith makes a house call and confronts Tammy about her partying lifestyle. While on the road with Chris, Tammy's health hits a dangerous low point.

Tammy hosts a housewarming party and has a few choice words for her mom; Amy's world is turned upside down when she finally confronts Michael over his lack of help with raising their two boys; meanwhile, Caleb hasn't been honest with Tammy.

Amy is ashamed of her behavior in Florida and wants to make amends, but she worries Amanda won't accept her apology; when Tammy gets some devastating news, her whole world is turned upside down, and her family rallies behind her in support.

Amy faces Michael in court at their first divorce hearing. Chris finds an unusual way to get healthy food. Tammy explores the possibility of having kids. Later, Tammy heads to rehab for a recon mission after learning some information about Caleb.

Caleb surprises Tammy with a romantic dinner date, but it goes south when Tammy learns what's on the menu. The Slatons attend a Zumba class together, but Amy's lack of self-care leads to a meltdown that has the whole family feeling déjà vu.

Amanda reels after leaving dinner; Chris crosses something off his bucket list; Tammy tries to have fun but misses Caleb; fed up with her siblings critiquing her, Amy reaches her boiling point and explodes.

Amanda and Misty get big news and take a major step in their health journey; Amy and Tammy blow off some steam; Amy gets some devastating news from her lawyer that sends her reeling.

The family preps for their very first beach vacation, and Tammy hits some major milestones. While everyone flies, Amy opts for a nine-hour car ride which leaves her and the boys cranky. Then, Chris gives Amy some tough love.

Amy gets unsettling news about the birth of her baby as her high-risk pregnancy has last-minute complications; with their next weigh-in ahead of them, Chris and Tammy are cautiously optimistic until Tammy steps on the scale.

With her weight spiraling, Tammy makes a life-altering decision.

No description available

The family vacation starts off terribly when Tammy refuses to enter the cabin. Chris hopes he's lost enough weight to fulfill a life-long dream. A last attempt to save the vacation ends in another confrontation. The siblings discover Tammy's secret.

Chris comes down on Amy for enabling Tammy.

After a rift on the family vacation, Amy returns home and drops a bomb on Tammy. While Amy focuses on her new life, Tammy makes a decision that takes her even further away from her weight-loss goals.

Amy must confront demons from her past, and Tammy admits to cheat days.