A Mount Olive family says they’re still in shock after their grandmother and her 9-year-old adopted son were killed in a car accident on Saturday. Officials say Grisel Hardy’s car crossed the center line on Kelly Springs Road and smashed into a truck. Hardy died at the scene, along with Bryceon, who wasn’t wearing a seatbelt. However, 6-year-old Shelly, who was wearing one, is expected to fully recover. She is hospitalized and has lacerations from the seatbelt.

The North Carolina State Highway Patrol told WRAL-TV speed didn’t cause the crash and Grisel didn’t appear impaired – but Hardy’s family believes the accident was caused by her exhaustion from a life spent caring for others.

The 57-year-old had adopted three of her grandchildren to raise on her own, and that afternoon she’d been driving two of them home: 6-year-old Shelly Hardy and 9-year-old Bryceon Hardy. Her third adopted child had emergency surgery on Friday, and she had been up all night watching over him.