"Hmm," said Julie. "I wish we'd know whether that plan does what we want." A second later, and she shook her head. "Fine! I wish we know why!"
Karyn, Jessica, and Julie didn't have to discuss it, of course, since the stone did tell them why. First of all, the wish was that they never become other than their mother's daughters. If they swapped bodies with two girls, the bodies wouldn't just have to be female, they'd have to still be their mother's daughters. Fortunately that was easy to fix; they could swap their mother at the same time.
The second problem wasn't that bad, but their mother had wished they'd be known by the names they picked--Julie and Jessica. If they used the swap trick, either they'd be guys named Julie and Jessica, or else the girls they swapped with would get those names. Changing two strangers' names really won't hurt them, but they would rather not do that.
"Wait a minute. I just thought of something," said Karyn. "That video you guys showed me. Your Mom made a lot of wishes in a row, but things like being an exaggerated man would be reversed by being two daughters. If that could happen, maybe we could reverse this wish the same way."
"Oh, that's an idea!" exclaimed Julia. "I wish we knew why that happened."
But it was no help. Their grandfather's instructions said that wishes can't be reversed once the breath is over. Their mother had made those wishes as a whole string of wishes together without taking a breath in between! So they could reverse each other. The only reason the wishes didn't all happen immediately (and the only reason the Jons' memories weren't changed by the wishes) was that she wanted to use them to make Jon learn his lesson, which meant keeping his own memory and having enough time between wishes to think about his new form for a while. [Author's note: Yeah, yeah, I fixed my own mistakes again, sorry.]
They decided not to change back from girls yet until they could figure out the name problem. All three girls spent some time writing it all down, and then Jessica made the actual wish, reading off the paper.
"I wish that when I snap my fingers, these things will happen. Mom will swap bodies with a woman who has two daughters, and Julie and me will swap bodies with her daughters. Each person's body will change to be exactly like the body they had before the wish. Then everyone teleports to where her original body was. Their names will stay with the person, not the body. Only me, Julie, and Karyn will remember what happened. Any part of this wish can be reversed by other wishes." Then she snapped her fingers.
Jessica was suddenly somewhere else, in a girl's body. Next to her was another girl. They were both younger... perhaps 12 or 13 years old. But before she could get her bearings, she felt herself moving, even though she wasn't... it was like the transformations before. Her body got older, and changed to become Jessica again. Then suddenly, she was back in the room. Julie was still there, and so was Karyn.
"Gimme that," said Julie, and took the stone. "I wish I was a guy for a second." For a moment, an Asian-looking version of Jon was standing there... of course, he was still named Julie. Then he changed back.
"It worked!" exclaimed Julie, plopping the stone back into Jessica's hand. "We can change ourselves however we want now. We can be guys again. We just need to figure out what to do about the names, and about their being two of us."
They were completely out of ideas, though...