Judy Mandel’s memoir Replacement Child tells of her parents’ decision to have a replacement child when her older sister was killed in a plane crash. Living with a phantom sister overshadowed her existence and made Judy invisible as an individual. Maggie and Gary Stevens shared their experience of living with their adult son and his wife, providing a home for them while their son was in graduate school. We discussed potential pitfalls of multi-generational living and ways to avoid them.