The page was a laboratory report, eleven years old, with the names Jacob and Nathan printed across the top. Beneath them, one line made the kitchen tilt: Probability of half-sibling relationship, 99.98%. I read it twice, then a third time, hoping the numbers would change. My hands went cold.

“Nathan found it in his mother’s desk,” Jacob whispered. “He thought it was a mistake. So did I, until I saw the bottom of the page.” My eyes dropped to the consent line. The signature there was mine, dated one week after my husband’s funeral. Before I could speak, a knock rattled the front door, and through the glass I saw Nathan on the porch beside his mother, Claire, both of them deathly pale.