Fifteen minutes before leaving for the airport, my 6-year-old daughter clung to my neck and whispered: “When you travel, mom puts something in my juice and then films me.”

Then Sarah reached into the pocket of her sweater.

She removed a small glass bottle, tipped her hand over Lily’s glass of orange juice, and slipped the bottle away again in one quick, practiced motion.

Someone who was not specifically looking for it might have missed it completely.