After Sarah's sexual pleasure reached its climax, she squirted semen into Jon's mouth. Then she collapsed into a heap, crying at her predicament, dropping the wishing stone in the process.
Jon sat back and licked her lips, liking the taste of semen. She liked sucking Sarah's cock, but it was weird for her to see Sarah as she was. Yes, Sarah had a penis, a flat chest, and a boy-style haircut, but everything else was definitely original Sarah. What Jon wanted was a real boy, not a transgender one.
While Sarah was still crying, Jon swiped the stone from the floor and made a wish.
"I wish that Sarah would become male." The stone flashed, then Jon and Zoe watched the changes ...