Don't Get Mad - Geraldine's Gems, #4

Book 4 of Geraldine's Gems romance series. What do you do when you feel sad that your marriage failed to a control freak? Sandra Robertson has let herself go and won't go out. Until her aunt Geraldine comes along and tells her 'Don't Get Mad, Get Even'. She should show Jim what he is missing. Sandra decides to get fitter, slimmer and healthier and joins the local gym, where she meets Troy, a personal trainer.
Over a couple of months, Sandra falls in love with him, and her daughter meets him and likes him, too. Then when Sandra has got fitter and slimmer and more confident, she and Troy make her his star pupil in his class where Jim is. Sandra finally stands up to Jim in public and wins. She has not got mad but even.