Steve has been spending a lot of time with Betty Jo. He's giving her flying lessons and she's his grease monkey in the airplane's repairs and maintenance. Billie Jo becomes jealous of her younger sister. Billie Jo tries to be more like Betty Jo and be a grease monkey for Steve. While Betty Jo tries to act more grown up in an effort to be seen in a more feminine light. Neither Billie Jo or Betty Jo achieve what they wanted. Betty Jo in particular feels let down as she wanted to feel like a threat to Billie Jo. After Steve's attempts to make it up to Betty Jo while letting her down easily fail, Betty Jo decides to take drastic measures to get what she wants.