Heather and Tim seek the help of Mary-Lynn and Spencer, Clementine's off-beat parents, to persuade Clementine and Tyler to get their unanticipated marriage annulled.
Greg doesn't want to vote in the presidential election. Heather starts working in Tim's office. Matt takes Colleen to the ER when she has stomach pain.
As Gigi dies, Greg anonymously donates some of the money she left him, and John discovers what Gigi's life was like in the nursing home.
Tim attempts to dismiss Heather. John tries to help Sophia overcome her phobia of flying. Lark's first birthday doesn't go as Jen planned.
Tyler and Clementine ask Matt and Colleen to come over for a dinner party, and Dougie is unsure of her inclinations.
John plans to have Samantha take up boxing instead of ballet. Jen is trying to get advice about tonsil surgery.
As they discuss going to Hawaii for their honeymoon, Colleen confesses to Matt that she can't swim.
Colleen has to put up with Joan's unfiltered opinions while she shops for a suitable wedding dress, and John and Matt help Sophia build a vanity.
On New Year's Day, the Shorts recall various memories from their past.
Matt, Greg, and Heather think that Joan might be having an affair, and Tyler and Clementine decide to get their own house.
Colleen and Matt host a family gathering during a Los Angeles Rams game, inviting former football player Kurt Warner.
While Joan tries to convince Heather that Sophia is ready to be independent, Clementine works at a car rental office.
On Valentine's Day, Greg and Jen hire a private chef to cook for them, and John and Joan want to purchase a vintage car.
While Matt and Colleen have a meeting with their wedding planner, Tim gets tickets to the Grammy Awards.
Jen and Matt have an uncomfortable dinner alone after Greg and Colleen don't come with them.
After he finds the money he accused Matt of stealing from him when they were kids, Greg triggers an old family feud. Joan feels insulted when Heather calls her forgetfulness "old age".
After taking a powerful sleep aid, Matt and Colleen go on strange sleepwalking escapades.
Matt meets with Colleen's father and his wife in order to get his approval for their upcoming marriage.
Matt and Colleen run into trouble while babysitting, and Greg gives Samantha dubious advice as an entrepreneur regarding her school project.
Colleen seeks Tim's help, while Heather's friends want to include Jen in their moms' group, which makes Heather jealous.
Greg and Jen take Lark on her first flight, while Heather and Tim face many hurdles as they try to make it to the airport on time.
Colleen and Matt fail to get on any flight to Mexico for their wedding, and Greg and Jen face a problem when they share a cookie with an allergic plane passenger.