Mrs. Jon Claus: Athena's Stone?

"I wish this was _my_ wishing stone," Athena said. The stone glowed, granting her wish. But how would it be granted? Would the stone simply be hers? Or would reality change some way, turning Athena into Zoe's sister, thus becoming part of the Gibson family and being able to inherit the stone? Or maybe it would just make her swap bodies with Zoe. Really, there were so many possibilities for what could happen.