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 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 Greg and Jen's crazy neighbors invite them to a party, Greg makes up a lie so they can get out of attending. Also, Matt and Colleen discover they need to give up some necessities to increase their chances of having a child; a delivery mix-up results in John and Joan accidentally receiving the fancy Japanese toilet Tim ordered for himself; and Sophia decides to shave her legs.

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.