Stephanie is a former party girl who trades in her cocktails for carpools when she instantly adds three children to her life by marrying their father, Charlie. Needless to say, she struggles to find a balance between her fun-loving and slightly irresponsible lifestyle with being a full-time stepmother. As she learns what being a mother is about, partially with help from her own mom, Stephanie tries to do things her own way. Among the motherly experiences she has are being on the parents' dance committee and planning a 'staycation' for her family.