As the last echoes of John's existence fades in her mind, and Sarah begins to eye her ill gotten wishing rock... it too fades away! she also notices the Karyn miniature stature fade away too!
Sarah screams " NO!!!!......" only to abruptly stop. She looks around , wondering what had upset her so much.
For without John ever having been existence, her wish that Jon were never anything but a normal bra , meant that Jon's grandfather couldn't have left his precious stone to him. While Jon is gone, Sarah's selfish evil wish cancells out the transformation of Karyn.
But if Jon is no longer in existence - who did gramps give the rock too?