Grandma Anderson was in a car accident which killed her, her son, and her daughter-in-law.
She came along with her son and his family on a camping trip. However, on their way there, they were in a car accident. She died on the scene of a head injury. Her son and his wife later died at the hospital, leaving her newly 18-year-old granddaughter, Lily, as the oldest surviving member of their family.
She and her son's family were close. They were planning to go camping together, but on the way, they were in a car accident, which ultimately killed her, her son, and her son's wife. Her three grandchildren were injured, but survived the accident.