Disappeared?

As they were leaving the building, they met up with Steve and his "girls". "Hey, Jen. Thanks a bunch for letting me wish for these two hotties." And then in a lower voice "They do *whatever* I tell them. And I mean *whatever*." "That's ... um ... good." "Glad you think so." "Steve, we've got to go. See you later." "Oh, okay." Steve turned to walk down hall Jen had come from, when he saw a crowd of students charging towards him. "What the ...? Hey, Jen. Did you see ...?" But when he turned back to Jen and her "boys", they were gone. "Where did they go?" asked Simone. "Yeah, we didn't get our wishes," said Meagan. "I don't know. They just disappeared." They all walked out of the school and looked in every direction. They weren't even in sight. There was no way that they could run that fast. The students deduced that she must have used the wishing stone to get away. But where would she go?