Sarah hesitated but knew it was true. She didn’t say a word to Nathan, allowing him to stay.

For the next three days, Nathan continued showing up, working silently before slipping away before Sarah could speak to him. At home, she barely saw him. Whenever she tried to confront him, he was nowhere to be found.

That evening, determined to finally put an end to it, she walked into his room—only to freeze.

Nathan lay on his bed, shivering. His face was drenched in sweat, and his breathing ...