Mark clicked his fingers, and immediately Jon felt a wetness running down his legs. Mark laughed and clicked a few more times, and then, just as Jon thought his bladder was empty, he discovered that for a Fem-Master, this didn't matter, as another click sent yet more rivulets of urine streaming down his legs.
Mark laughed. "Have fun growing up again, Joan!"
After the door closed, Joan found that she didn't feel compelled to do anything, except talk with the sudden presence in the room, a girl, about her age.
"Who are you?" asked Joan.
"Me? I guess you could say I'm Mother Nature," the girl said. "That Fem-Master called on me to be generous in your new puberty, so here I am."
"What are you going to do?"
"What I can. His wishes left a fair deal of leeway for me to get around them."
"Like how?"
"Well, for instance, I just altered one of your cells so that it has an XY pairing instead of an XX. Just one, and I sealed it off against reproduction or death. It means that you're no longer a complete female, and thus not subject to his powers, or his wishes regarding women."
"You can do that?"
"It's generous, isn't it?"
"Yes, but what about his wish for me to be his adopted sister? If I'm not technically fully female, how can that be true?"
"Well, you're a lot more female than you are male, so legally, you are a woman, and his sister. You're just not a woman biologically, and that means that I can ignore his wishes about what women should be like."
"So, what are you going to do?"
"Well, I still have to be generous, but now there's a lot more about which I can be generous."
--
Mark returned from a wonderful outing. It was a real kick to be able to make a woman lose her bladder control in public, and even more of one to use the stone to alter them to be more feminine. He even turned some guys he hated into women just so he could embarrass them like that.
He wondered what Joan would be doing when he returned. What he got was not what he expected.
Joan was lying on the bed, masturbating furiously, as he had wished. What he hadn't wished--what he couldn't understand--was how she had the body she had.
It was clearly very feminine, but almost completely contravened his earlier wish about what women should look like, which had been based on Jon's own fantasies.
Joan's breasts were large, true, her waist narrow and her hips and butt wide and bulbous. Her hair was a midnight black, and Mark guessed that if she stood up it would reach to her ankles. The problem was, this meant that Joan's hair was almost eight feet long.
Mark couldn't see her face, but he could see that she had broad shoulders with strong, muscular arms, and her hands were decidedly not dainty. She showed a clear six-pack, and her legs were also muscled, ending in clearly powerful feet.
"Joan?"
Joan's self-pleasuring came to a halt. "Oh, hello, brother."
Mark clicked his fingers. Joan laughed.
"Oh, don't bother, You see, you wished for Mother Nature to be generous and, well, she was very generous."
"But you're a woman! You can't be that tall or strong!"
"You weren't that clever, Mark. Mother Nature found a way around your various wishes. Technically, I'm not quite a woman any more, and so your abilities as a Fem-Master don't work on me, and your wish that made women like my fantasies doesn't apply, either."
Mark began to back away, but Joan was too fast. She knocked him unconscious and took the stone.
"Now, what should I wish for?"
