When Tim and Heather go to an expensive dinner to celebrate their anniversary, they are determined to finish every bite of their pricey 20-course meal. Also, Jen and Greg try to quickly potty-train Lark before her first day of preschool; Tyler gets jealous of the attention Clementine is getting at work; and Matt and Samantha team up for a “Middle Child Day” and go to a trapeze school.

When Sophia feels like she is no longer the cutest kid in the Short family, she tries frantically to regain her status. Also, Joan gives Jen a beautiful necklace, forgetting she already gave it to Heather for her Sweet 16, and now she has to get it back; Greg tries to fit in with his new young coworkers but takes things too far; and Colleen and Tim bond when he helps her administer the hormone injections for her IVF treatment.

After Tim has a heart attack, he becomes super clingy and annoys the entire family. Also, Greg and Jen make a pact to keep their baby's gender a secret; Sophia's new pet frog turns out to be a dangerous species; and Matt and Colleen receive news about their impending adoption.