What a lovely memory for you to have, it is amazing how music is such a good positive simulation, my mother also will get up dance with me slowly but has to lean on Zimmer frame now. if you mother does not want to go every other day, don't worry about it .don't get upset with her if she still does not want to visit, Just let her do it in her own time when she feel ready emotionally. . my – be she just needs real time out in a nice environment to gather her thoughts emotion together , without the added worry guilt of not visiting your father . Then see how she feel after the 2 weeks with you . Also the emotion of how her changing relationship is with her husband, how they life has change together.