With both stones Karyn made a wish that should stop Jon and Jane from fighting, or at least on this subject.
"I wish that you couldn't change each other without the others consent first."
Neither of them heard her but did stop when they tried to change each other. Karyn told them what wish she just made and now saw nothing but the same stares, but at her now. Maybe it wasn't as good an idea to get involved in this as she had thought.
Jon and Jane tackled Karyn at the same time trying to get the stones back from her. As fast as she could Karyn made another bad wish.
"I wish you could only feel each others body's with permission from the other."
Jon and Jane instantly went back to having only one sense of feeling, yet by the time that they had taken the stones from Karyn they had calmed down considerably.