When Jon got to the mall, he tried on clothes, but they didn't fit right. He put his hand in his pocket and whispered "I wish I filled these clothes like I'm supposed to."
The stone glowed and suddenly, his body changed shape so that it fit the female clothes he was now wearing.
Jon looked down at her body and smiled, not thinking of the consequences. At the end of the week, Jon would have his own personality back, but would be stuck as a girl.