MY SEVEN-YEAR-OLD GRANDDAUGHTER CLUTCHED MY HAND AND WHISPERED, “GRANDPA… MOM PUTS SOMETHING IN MY JUICE.” I THOUGHT IT WAS JUST A CHILD’S FEAR—UNTIL A MEMPHIS DOCTOR READ HER TESTS, FROZE, AND WENT SILENT FOR FOUR LONG SECONDS.

When I called his office, his secretary said he could see me the next morning at nine.

I was there at eight-forty.

His office smelled like paper, old wood, and lemon polish. He listened without interrupting while I laid the clinic folder on his desk and told him exactly what Ruby had said, exactly how she had looked, exactly what the doctor found.

When I finished, he put on his reading glasses, studied the tox screen, and exhaled through his nose.

“That,” he said, “is extraordinarily bad.”

“I’m aware.”

“Who else knows?”

“Doctor. Me. Nobody else.”

He tapped the papers into alignment, thinking.

“You were right not to call your son first.”

“I haven’t been sure whether that makes me smart or cruel.”

“Smart,” he said. “Cruel would be leaving the child there.”

He leaned back in his chair and folded his hands over his stomach.

“The problem,” he said, “is that fathers in Daniel’s position often need a sequence they can survive. If you tell him his wife is drugging his daughter and sleeping with someone else, and you have only half the evidence for either, his mind will attack the uncertainty because uncertainty hurts less than certainty.”

I stared at him.

“I didn’t mention an affair.”