Stephanie trades in cosmos for carpools when she marries an older man with three kids. Her new role of full-time stepmom is challenging as she struggles to maintain some sense of her fun-loving, slightly irresponsible self.

Stephanie tells James that lying is OK if it makes someone's day better, which leads him to tell a huge lie. When everyone is called to the principal's office, the family must find a balance between honesty and shading the truth.

Stephanie's determined to bond with the kids and uses her love of music to do it. But by forcing them to take up an instrument against their will, Stephanie learns a very public and embarrassing lesson in parenting.

Aaron's being given a hard time at school, and when Stephanie tries to intervene, she makes matters worse. Gabby's trying out for cheerleading and Maggie volunteers to coach her, but comes off more like a drill sergeant.

Gabby gets asked out by a boy, and she wants to go, but Charlie doesn't want her to date until she's 16. Maggie backs him up, but Gabby sneakily gleans advice from Stephanie on how to get around the rule.

Stephanie doesn't get carded at a club and is feeling old. When she escorts Gabby to a lead singer audition for a rock band and instead lands the gig, she sees it as the pick me up she needs, but Gabby doesn't share the feeling.