"How do you know about the stone?" Zoe asked Jon.
"Zoe, you showed it to me yesterday, at school. Remember?"
"I didn't show you the stone. I only showed it to Athena."
"Athena?" Jon asked. "I'm your best friend, Zoe. Why would you show it to your sister and not me? That doesn't make any sense."
"Athena's my sister?" Zoe asked. What exactly did her wish do?
