Jon went for a walk down near a river in a local park. As he now had magical powers he didn't see any need to go to school. A group of girls from a local school however were doing a field trip on the other side of the river. The female teacher was pointing out types of flowers and animals as the girls followed along behind. One girl had wandered off by herself and was in some trees near the water.
"This is just the chance to try out my new powers", Jon thought and made a wish. A second later he was a magical shemale. Jon's magic penis pulsed with magical power. He tensed the muscles in his abdomen and flicked his huge penis like a fishing rod. The girl flew into the air as if caught by and invisible line. The girl's clothes disappeared as she flew across the river. Jon lay on his back waiting for the now naked girl to come down onto his waiting penis. She screamed as the penis entered her vagina. If it weren't a magic penis it would never have been able to enter her. But the girl's vagina opened wider and wider until Jon's entire penis was now inside her. Her arms thrashed around as she fought against the rising sexual pleasure she felt as the magic of Jon's penis began to transform her. Jon wished some vines from surrounding forest to wrap themselves around the girl's arms to stop her waving them around. The girl's hips grew wide, her bottom swelled and she soon stopped struggling as she felt an incredible sexual pleasure taking her over.
"That's it, you're mine now", Jon said as he wished his penises power to transform her further. The girl's cries were now those of ecstasy as her body changed. She grew taller, her short hair grew longer and fell down her back. Her chest heaved in and out as she breathed faster and faster. Jon wished himself to cum into her. The girl cried out as a huge torrent of cum flowed into her. As Jon's penis began to cum into her, the girl's chest began to swell and swell until two huge breasts had appeared on her chest. The breasts continued to grow with every pump of Jon's magical shemale penis as more and more transforming cum poured into the girl.
Back with the class, the teacher heard the girl's cries. "What the heck is that noise?" she thought. The teacher turned to the class. "All right girls. Line up with your buddy". The girls obeyed only one girl didn't have a buddy. "Judy", the teacher asked, "where is your buddy? Where is Mandy?" The cries coming out of the forest were clearly being made by a couple having sex, the teacher thought. The first few cries had given the teacher a bit of a fright. It had sounded like Mandy's voice. However, now it was clearly the voice of a woman, not a girl she was hearing. And it was coming from the other side of the river, so it couldn't be her.
Apart from her face, the teacher wouldn't have recognized Mandy if she had seen her. Jon was still transforming her. Now he began the final part of his fantasy. Jon's penis took total control of the girl. It swelled inside her as Jon wished the final transformation in his fantasy. The girl emitted one long cry as a huge penis grew out of her crotch. Then she cried again and again as jets of cum spurted out of the still growing penis swelling in front of her.
"Become my shemale sex slave", Jon grunted as he felt his magic penis transforming her. He knew the girl was now entirely under his control and would do whatever he wanted.
Unfortunately at this point Jon's fantasy ran out. The transforming idea was what he really liked. He hadn't actually thought about what he would do with a shemale sex slave once he had created her. The class on the other side of the river were still looking for Mandy. Jon thought it might be better to end this fantasy and turn everything back to normal.
