While Joan is bedridden recovering from surgery, she persuades Sophia to spend time with her, which she quickly regrets. Jen and Greg select a name for their new baby only to learn that Matt and Colleen chose the same one. Colleen and Matt invite the family over to get to know Morgan. Heather has a new business idea.

When Colleen and Matt learn they may not be allowed into the delivery room for the birth of the baby they are planning to adopt, they try to convince Morgan to have the baby at home. Heather is thrilled when Samantha has a falling-out with a friend who was a bad influence. Jen thinks Greg bought her a beautiful present only to discover it wasn’t for her. John encourages Tim to see a cardiologist.

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.

After John befriends the janitor at Sophia’s school, Mr. Sissel, John learns that Sophia and her friends believe a childish rumor about him. Also, Heather pushes Tim and Joan to go for walks together while recovering from their health issues; Matt and Colleen try to tame Dougie’s bad habits; and Jen is desperate to not go into labor during Lark’s birthday party.

Greg scrambles to find Lark when he loses her at the hospital while visiting Jen and the new baby. Also, Heather offers to help Sophia with her math homework but can’t figure out the new teaching method; Matt enrolls his adopted son, Lucas, in a father/son art class; and Colleen organizes a family photo shoot and glams Joan up for the occasion.

Heather and Tim try not to freak out when they get an emergency text from Samantha to pick her up in the middle of the night; Tim endures an embarrassing public situation; John accidentally walks in on Jen while she's breastfeeding the baby.

When Tim gets a toupee, the family try their best to hide their horrified reactions; Jen fights for face time with her boss; Joan decides to retire; Greg and Matt build a playhouse for the kids.

When Matt and Colleen treat Jen and Greg to a fancy dinner as a "thank you" for writing a recommendation letter, Jen and Greg are mortified when they realize they never wrote it; Sophia asks Tim and Heather to get her a pig.

Jen and Greg hire Edna—the cleaning lady who has worked for John and Joan for years—but Jen is horrified at her strange habits. Matt, Heather and Greg race to find the valuable souvenir pens John brought them when they were kids. Lucas is terrified of Joan. When Tim invites Matt over to watch a sporting event on television, it takes a weird turn.

When Matt helps Grandpa Mort efficiently book a family trip to the Bahamas, the family is super impressed, so Greg reserves a cabana at the pool to outdo Matt. Tim saves the life of a fellow hotel guest. Matt and Colleen take an excursion to a private island. John learns some astonishing news about his father.

When Tim and Heather realize that being grandparents is very far off in the future, they decide to have another baby. Joan gets frustrated when she keeps getting tasked with watching the grandkids. Jen and Greg decide to look for a new house. Matt gets a job offer in Germany, which is problematic for Colleen and Lucas.

Matt and Colleen experience crazy sleepwalking adventures after taking a sleep aid; Jen tells Greg she had a sex dream about a family member; Tim wants to help Sophia get through a slumber party; John installs a motion-sensor light in the yard.

Greg becomes frazzled when Lark rebuffs him and only wants to be held by Jen. Also, Heather refuses to get the reading glasses she desperately needs; Colleen introduces Matt to her eccentric father so he can get his blessing for their upcoming nuptials; and when Cousin Mikey goes through a tough breakup, Joan tries to set him up on a date.

When Colleen and Matt host the family tailgate party at the L.A. Rams game, they invite former NFL quarterback Kurt Warner to spice up their so far dismal event. Also, Tim's in danger of missing the game when Sophia makes him take her to the restroom.

When Colleen goes wedding dress shopping with her future in-laws, she must deal with Joan's unfiltered opinions. Also, when Clementine feels she's overstaying her welcome at the Hughes house, she starts being extra nice to Tim who takes it the wrong way; Greg gets frustrated when Jen can't stay awake after a romantic date night; and John and Matt attempt to build a vanity for Sophia after John rips up the directions.

In the season finale, when Colleen and Matt miss all the flights to Mexico for their wedding, they question if they will ever get married. Also, Greg and Jen get into trouble when they share a cookie with a fellow plane passenger who has a severe allergic reaction to it, Joan and John rush their dog to the vet after he swallows Matt's wedding ring, and the Hughes family moves into Tyler and Clementine's tiny house when a fire breaksout in their kitchen.

When Tim gets two tickets to the GRAMMY Awards from his rock star patient, Charlie Puth, he brings Samantha to the show to impress her. Also, Matt and Colleen realize how out of control planning a wedding can get when they meet with their offbeat wedding planner, Ned Gawler; John and Joan join Facebook so they can stay connected to the kids; and Heather manically tries to save Sophia's beloved goldfish from dying.

Matt and Colleen have a disastrous time babysitting Lark while Jen is at work. Also, Sophia is far from pleased when John buys her a butterfly kit for her birthday; Tim and Heather rehash an old fight from the early days of their relationship; and Greg gives Samantha questionable advice about being an entrepreneur for her school project.

When Sophia asks Matt and Colleen about having children, an animated sequence featuring the whole family as farm animals reveals that they have been struggling to have a baby. Also, Jen and Greg's new neighbors aren't as nice as they initially seem; Heather interferes with Tim's hiring process at the office; and the whole family surprises Joan at her book reading, to her chagrin.

Greg lies to Jen about voting in the presidential election; Heather starts working with Tim at the office; Tim gives Joan a medical marijuana prescription; Matt takes Colleen to the emergency room.

Heather freaks out when Samantha auditions for the high school musical and the director doesn't give her the part. Also, Matt, Greg and Heather suspect Joan is having an affair, and Tyler and Clementine decide to find a home of their own.

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 settlementfrom 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 Colleen teaches Matt her frugal ways, he gets hooked when he realizes how much saving money turns her on. Also, Tim attempts to fire Heather from her receptionist position at his office, John tries to break Sophia's fear of flying by taking her for a quick flight on a small plane, and Jen plans a quiet affair for Lark's first birthday, until the family takes over the celebration.

When Joan's creative writing teacher, Professor Sinclair Wilde, praises her work, John assumes it is because he has a crush on her. Also, Tyler and Clementine invite Matt and Colleen over for an awkward dinner party; Jen tries to hide it from Greg when Lark takes her first steps while he's away on a business trip; and Colleen, Heather and Jen take Dougie out for ladies night when she realizes she might be gay.

When Greg and Jen hire Allie, a private chef, to cook for them on Valentine's Day, the evening isn't as romantic as they had hoped. Also, Matt and Colleen try to adopt a dog from Ruth, a judgmental animal advocate; John and Joan attempt to buy a classic car from dealership owner Gavin; and Sophia gets a necklace from a boy for Valentine's Day, to the chagrin of Heather and Tim.