When the entire Hughes family moves into John and Joan's home after their kitchen is destroyed, their presence creates chaos for Joan. Also, Matt and Colleen are set to receive a huge monetary settlement from Colleen's fall off the motel balcony on their wedding night; John tries to get Sophia back on track when she starts misbehaving; Tyler and Clementine make a surprise announcement to the family; and Jen and Greg attempt to persuade Lark to get rid of her pacifier.
When Jen invites her boss, Paul, and his wife over to dinner to impress him, she and Greg can't remember his wife's name and scramble to avoid embarrassment. Also, Tim urges Tyler to start dating; Matt ends up having a nightmare about parenting after he and Colleen discuss having children; and Joan grows increasingly stressed about Heather living with her.
When Heather finds a map to a time capsule she buried with her brothers as kids, they all set out to find it and dig it up. Also, Jen learns she has a low car service rating so she books rides across the city to charm drivers and increase her score; Joan joins her neighbor's poker game in an effort to win an unusual prize; and John finally gets hearing aids but they aren't having the effect he was hoping for.
When Heather, Clementine and Jen offer to save Joan from the stress of preparing the Thanksgiving meal, the free time leaves Joan even more frazzled. Also, Greg has a boost of self-confidence after learning he has high levels of testosterone; Samantha keeps a secret from her family during Thanksgiving dinner; and John is determined to continue the tradition of using his old, unsafe knife to carve the turkey.
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.
Jen and Greg decide to take turns dealing with her annoying parents when they come to visit. Also, when Tim and Heather chaperone Samantha's dance, Heather runs into an old flame; Colleen cashes in the many "love coupons" Matt has given her as gifts over the years; and Sophia digs up disturbing information when she investigates the family lineage.
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.
Jen and Greg go to great lengths to find the perfect babysitter for Lark. Also, John becomes testy when shopping for a mattress and Joan realizes the unusual source of his aggravation; Heather learns information about Samantha's boyfriend that she isn't sure she should reveal; and Matt believes he may have a history with Colleen's sister after he meets her for the first time.
Tyler and Tim realize they are in over their heads when Heather tasks them with buying a bra for Samantha. Also, Joan asks Jen to submit a recipe for the family cookbook, prompting Jen to steal one from her favorite restaurant; John gets Samantha and Sophia hooked on gambling while babysitting for them; and Colleen and Matt obsess about their surrogate's unhealthy lifestyle.
Colleen and Matt think they have found a clever way to say thank you; Sophia uses her legal skills to win her case for a second ear piercing; John becomes a model senior citizen only to find that the lifestyle is not as glamorous as he would have hoped; and Jen and Greg rediscover adult freedom as Lark becomes more independent, but will their carefree behavior take them back to square one?
Tim and Heather plan a surprise birthday party for Samantha, but the night takes an unexpected turn when Samantha doesn't come home alone. Also, Matt and Colleen are in an awkward situation with their surrogate; John and Joan learn Spanish for their next adventure; and Jen and Greg have to find a way to keep their secret from the family.