"... your twin sister Julie."
"But I don't... ah, never mind." Something funny was going on. Jon didn't have a twin sister. The room looked mostly the same--was it possible that someone else had lived there? Would he open the closet to find her clothes and her things?
Quickly he ran into the room, shut the door, and looked around. It did look as though someone else had lived there as well as Jon. There was no mysteriously appearing second person there, however.
Then he sat down. Got to find out, he thought. Maybe the stone would know. "I wish to know why there seems to have been someone named Julie living here."
"... and that's what happened," explained Jon to Karyn. "I asked the stone and it told me. The stone changed history to make that blue branch at school. It's blue because I have a twin sister and years ago, long before it fell down, my sister painted it blue as part of a prank."
"So you have a new sister? All because of a wish to make a branch blue? Weird."
"No, Karyn! That's what's really weird. The stone has a limited range. The stone changed history so that my sister was away for spring break visiting my grandfather. My other grandfather, that is. Her plane doesn't get here until late tonight. She's not going to be on it, because my grandfather's way out of range of the stone. So an hour from now my folks are going to drive to the airport to pick up someone who's going to be mysteriously missing. I'm still not sure what I should do other than to ask the stone to solve it."
"But if the stone turns a branch blue by making a new family member, that's pretty unexpected. What if it does something even more unexpected when you tell it to solve the problem?"
"Oh, it was probably just a fluke. I don't have a lot of time to fix this anyway."He got out the stone and prepared to make his wish....