Zoe mulled it over for a while, "Ok, I've decided", she said.
Jon and Karyn perked up, "What exactly do you have in mind?"
Zoe smiled, "Well, I thought it over and the only real solution I can think of is this. Every other sort of option you've provided is too difficult to execute, I really don't care one way or another whether wishes are permanent or not, I know if I wish for a dick, Emily will love it, she loves me and loves it when we have sex with toys, and so this will be like a big toy for her"
Jon shrugged, "Ok, if you really, really want it, go for it. But just don't come crying to me when you get sick of it", he said.
"Noted", Zoe replied.
Jon and Karyn just watched Zoe, she was thinking intently and looking at the rock the same time, "I want this to be right, but I don't want anything to change, let me think"
After a moment, Zoe spoke, "Well, I think I have the wish now"
Zoe held up the rock and spoke to it, "I wish that I had a penis, the same size as Karyn's and I wish that I can reverse this wish at any time by making a wish on the rock again, as well, no one should think it out of the ordinary that I have a penis and all my clothing will more comfortably fit me even with my new equipment", she said.
The rock glowed in Zoe's hands. Jon and Karyn waited intently for the outcome. In a few seconds Zoe looked suddenly startled, she looked down at her skirt and could see a bulge growing out of her skirt, in a few moments the bulge stopped growing. From what Karyn and Jon could tell, Zoe now sported a rather impressive package.
Zoe twisted her waist around a bit, left and right again, before bending over, "Wow, that is surprisingly comfortable", she commented, "The wish worked completely it seems"
Jon nodded, "Well if you know what you're doing, it will work every time. It's quite clever that you thought of that counter-wish clause in your wish. I'd never have thought of that before", he said.
"Well that's because I'm a genius", Zoe said proudly, standing up, her new equipment was very obvious under her skirt.
Zoe walked back to the cabinet and put the rock back in the display and closed the cabinet behind her. She walked back over to Jon, still looking proud with herself.
"I should get going", Zoe said, looking at the two of them, "It's been fun"
Jon and Karyn rose from the chair, they both took their turns embracing Zoe in a friendly hug before she headed for the door.
Karyn called out behind her, "Give our regards to Emily"
Zoe turned back to them as she opened the door, "Oh, I will"
"Have fun!" Jon added.
Zoe waved back at them as she walked to her car in the street, the door swung closed behind her. Jon and Karyn hugged each other tightly.
"Well, do you reckon she's going to be sick of it in a few days and want to change back?" Karyn asked.
"Did you?" Jon replied.
Karyn laughed, "No, I guess not", she grabbed Jon's arm and pulled him towards the bedroom, "Come on, let's see if I can make you sick of it", she said playfully.
"Hey, she left her dagger behind", Jon commented as they walked past the table.
The both of them laughed as they headed for the bedroom.