Sue Petrovski has always been capable, thoughtful, and productive. After retiring from a long and successful career in education, she published two books, ran an antiques business, and volunteered in her community. When her mother was diagnosed with Alzheimer's disease and until her death eight years later, Petrovski served as her primary caregiver. She even cared for her husband when he also succumbed to dementia. However, when Petrovski's husband fell ill with sepsis at the age of...