At his house, Jon was still fast asleep when Karyn made her wish, so he didn't notice it when the stone sitting atop his nightstand suddenly glowed. And since he didn't hear Karyn's wish, he didn't notice the effect it had on him.
About ten minutes later, the alarm clock went off, causing the new occupant of Jon's bed to wake up.
The new person yawned and stretched, then shut off the alarm and got out of bed.
The reflection in the bedroom mirror showed ...