"I wish," said Jon, "that, until I wish otherwise...my mom becomes a guy!"
The stone glowed, and Jon knew that his wish was granted.
Jon heard someone go into the kitchen to make dinner and went out to see how things had changed. He saw what had been his mom opening the refrigerator. The face looked familar, but it was covered by a beard.
His hair was shorter, and everything about the individual once his mother was male. So...what else had changed?