Sarah was enjoying herself immensely. Fooling with Jon, and with the whole town around him by extension amused her greatly.
She had thought about turning him into all manner of things. But, leaving him mostly alone...at least for now, and changing things around him was good enough for now.
Sarah wasn't particularly thinking of the consequences of her wish. She was clever, but even she, by making things go slowly, and her wishing to be able to add details...like cleaning up that freak Zoe, as she watched, was unable to see the final picture. It was something she hadn't even considered. But she wasn't a big picture kind of girl.
It didn't occur to her something might happen if Jon ever got anywhere near her, for example.
