Sam squeezed his hand back, hard. She didn't say it's not your fault; he wouldn't believe her if she did, even though she didn't think it was his fault. It was an accident.

"I'm so sorry," she said, her voice low. Sam knew what it was like to lose her parents and her dearest friends; she could not even begin to imagine what it would feel like to lose a child, especially not in the way that Jack had lost Charlie.