She wrapped her hand firmly around his wrist, in a way that made it clear she wasn't going to let him go, and triggered the transporter. Only when they were safely materialised did she release him—and that she did quickly.

She resisted the urge to wipe her hand off on her trousers and folded her arms, watching him. After a moment she took a clean handkerchief out of her pocket and handed it to him.

"I suppose you'd like to know why," she said, after giving him some time to recover.