After dessert, Vanessa rose. “I’ll make your tea.”

“You don’t have to.”

“I want to.”

She went into the kitchen. Through a hidden feed on Dana’s tablet, detectives watched Vanessa remove the red-capped bottle from an inner pocket of her purse and place three drops into Graham’s blue mug.

Then she paused. Instead of returning the bottle to her purse, she walked toward the staff hallway. Graham’s pulse accelerated. Vanessa disappeared from the kitchen camera for fifty-eight seconds.

When she returned, the bottle was gone. She carried the tea into the dining room and set it before him. “For your stress.”