After Tammy's bad doctor's appointment, Chris comes down on Amy for enabling her sister. The family worries Tammy's new boyfriend is leading her down the wrong path. Amy's idea of having a meet and greet to help Tammy has its own set of problems.

Chris faces a weigh-in to get approved for bariatric surgery; with Tammy's weight at a standstill, Amy and Michael make a life-altering decision; the family's fears about Tammy's choice in partners are realized.