Like the story

Karyn held the rock and said "I wish, that for one hour ... Jon would be just like the main character at the end of the story I just read before he got here, but respond to the name Jon, instead of the character's name."
When the flash subsided, Karen turned to see a very different Jon, tied to her bed. The new Jon was now completely female, not much older than nineteen, dressed in a pair of very long black latex, spike heeled boots, a matching full black latex pantie and long black latex opera gloves. Her feet were tied securely at the ankles, to the corner bedposts and her hands likewise securely tied above pretty though troubled face, to the white iron bars of the bed head.
Even though Jon's knees were almost touching, in an effort to protect her vulnerable new sex, her body was limp and relaxed. Just visable between her soft thighs could be seen a small white disk, protruding slightly from her crotch. Attached to it's centre, was a chord that draped over her leg, ending in some sort of small control device.
Karen smirked as she looked down on the very helpless girl, who for the previous seventeen years had been her best friend, her best MALE friend. "So, he doesn't want to be a girl hey?" Karen mused, "I'll bet he wouldn't ever feel what he is going to feel soon, while he was a guy. Maybe like in the stories, he'll want to stay this way when I'm done?"
"Jon, can you hear me?" Karen asked.
"Yes Mistress, I can hear you," came her (Jon's) far away reply.
"Jon, when I count to three, you will wake up. You will clearly remember our conversation about you not ever wanting to be a girl, and you will also instantly realize, that a girl is what you now are, in every way. You will have none of the memories that the character you currently resemble would have, except for all your trigger phrases. In essence, you are Jon only, now in a female body, compelled to obey all her deeply ingrained hypnotic commands. Do you inderstand your instructions Jon?"
"Yes Mistress, I understand my instructions Mistress," intoned Jon.
Karen Smiled and said in a clear voice, "Good, One, two, three..."