Annie flushed, her pupils already dilating at the contact and the suggestion she might become frustrated, and she experimentally wiggled her fingers as he cuffed her. "I'll be good," she promised softly, smiling. Mostly because she, also, didn't really want to break them right away. That was kind of the point of going along with (or, in this case, outright requesting) being handcuffed. "Or at least I'll really try to."

Depended on how frustrating he was planning to be, really.