Mothers sacrifice. It's part of the job description. But in this short audio story the mother's sacrificial living really began when the heavy lifting of motherhood for most moms ends—when our kids go to college. 

Jenny Carter's son, Sean, sustained a traumatic brain injury in a car crash when he was a college student. He can't walk and can speak only through a computer. He interviewed his mother, who's his full-time caregiver, at StoryCorps.