Bess is cross with Margaret for not taking her diabetes seriously and refusing to exercise, so when Brianna becomes a qualified fitness instructor she sees an opportunity to help both her adoptive mother and her older sister. Margaret reluctantly agrees to train with Brianna but, truthfully, only because she thinks it will make Bess jealous. Bess, so unaccustomed to having Margaret's attention anywhere but on her, feels threatened when Brianna gets close to her adoptive mother. Brianna is upset when she discovers what Margaret has been up to, but Margaret insists that it isn't true - any more. She likes Brianna and really can talk to her. Margaret finds herself talking to Brianna about her past in a way she has never done before.