There is a specific kind of exhaustion that comes with caring for an aging parent or loved one. It is not just the physical demands. It is the mental weight of holding everything at once: the medications, the meals, the appointments, the moods, the worries. You forget whether your father took his blood pressure pill at noon or whether you just thought about giving it to him. You realize at 4pm that your mother has not had anything to drink since breakfast. You lie awake running through tomorrow's list, terrified you will drop something important.