That was an excellent question, even after acknowledging the irony in Spencer's tone. Part two of William's plan had originally been 'wait for her to leave', but Hayley seemed to be disinclined to take herself elsewhere. She could be fiercely tenacious when she wanted to be. It was one of the things that had most attracted him to her back in school: Hayley was almost larger than life.
This wasn't broom-back waterboarding or eating a live fire slug, however; it was deliberately sabotaging afternoon tea, which was in William's opinion infinitely worse.
He considered Hayley's current position, then flicked a glance at Spencer and began formulating a new plan. "Sacrifice you as a decoy," he replied finally, arching an eyebrow. "Then slip back to the library once you've led her safely astray." It was a good plan, if he did say so himself. "She'll never suspect you. You're all rosy-cheeked and harmless-looking. The very picture of herbologically-inclined innocence."