"My name is actually Karl. I accidentally changed myself into a girl when I used the stone. But you didn't hear my wish, so you think that I've always been a girl."
Jon's jaw dropped. He couldn't believe it. But it had to be true, because he was wearing the Necklace of Truth. "So ... you're actually ... a guy?"
"Yes." Then she paused. "I really didn't want to tell you this. I didn't want to make things worse for you."
"Worse? Worse than what?" Jon asked.
And again, Karyn (or was it Karl?) was forced to tell the truth.