Karyn went home with Jon and helped her carry the guns back to her house. When they got in, they found the house redesigned. All the doorknobs were giant paw friendly. As was the telephone on the wall. It was shaped differently, with fabric on the side for claws to grip into so that it could be picked up by a cat's paw, and a GIANT keypad on the wall. The computers also had GIANT keyboards. Supposing Karyn's house had changed similarly, that would explain how her mom had answered the phone so promptly herself.
"What are we going to do now nya?" Karyn asked.
"We go back and get the pieces of nya, nya, never mind, that's sillynya, we can just wish the pieces were all here nya," Jon said.
"Oh yeah nya, that saves a bunch of trouble. Heynya, you can ask for it to be put back together nya!" Karyn chirped.
"Of course nya!" Jon said. "How silly of me nya. This should be easy nya."
Jon got out the box in which the stone was and dumped it out onto the floor. She (Jon) touched a paw to it and said "I wish all the pieces of the magic gun that we broke were here now nya. Aahhh, nyice nya. What a mess nya. Nyow, I wish that all these broken pieces were reassembled into a working gun nya." She pulled back her paw and said, "I hate to leave you in suspense, but nya I really nyed to use the bathroom nya, I can't even think straight nya so I'll have to do it as a girl nya, I hope I can figure out how nya hee hee nya!" Jon rushed into her little bathroom and closed the door.
"NYAAA!!" Karyn heard a scream from inside the bathroom, followed by rushing water from the bathtub.
"Nya you all right in there nya?" Karyn asked.
"Nya, I just dipped my tail in the toilet water nya! Gross nya!"
Karyn laughed.
"It's not funnynya!" Jon cried.
"Oh come on Jonnya, yes it is nya." Karyn teased.
"Yeah, nya, I guess it is nya he he nya," Jon admitted.
Karyn looked at the stone on the ground. She put a paw on it and said "I wish that time in this room would change temporarily nya, so for the nyext hour of my time nya, only one second will pass for the rest of the world nya, and then it would speed back up nya, and that's only for this room nya, not even the bathroom Jon's in nya."
All sounds from the bathroom ceased. Time was passing 3600 times slower for Jon, for everything else in the universe outside of that room.
"Time to think nya," Karyn said to herself.
The thing is, Karyn wanted to keep her current self. Because she was secretly a furry. She adored being like this. She had kept this hidden, from everyone.
Something else Karyn kept hidden was the fact that she was a lesbian. She didn't hide it perfectly. She was quite a tomboy after all, her best friend was a guy, and her interests were pretty much masculine things. But she liked girls. In theory. In theory, because yet despite this, she was hopelessly in love with Jon. Had been for a long time. She thought he was the most wonderful person on Earth, and it was just so awful that he had to be male. This was why she was limited to being his best friend. She loved him dearly, but the sexual spark just wasn't in it. She couldn't force herself to find him sexy. And she had tried. And she knew it wasn't his fault, even though he was a beautiful and brilliant person. But now Jon was a girl! And a catgirl no less! A real one! With real cat ears, and a real tail, a huge one, and even real fuzzy kitty paws! With three pairs of breasts! Big ones! And if her own body was any indication, furry ones! Who said nya! It was a dream come true! She couldn't believe how perfect it was! And so she couldn't let Jon ruin this for her. Maybe it wasn't the happiest outcome for Jon, but she would see to it that Jon was made happy. She was confident she could make Jon happy with this. Jon just needed to be stuck accepting it, and eventually she would love it, Karyn was certain of this.
But as part of loving Jon, also she didn't want to alter her mind. Not one precious memory in her beloved Jon's beautiful brain was to be falsified. Not one tiny nudge was to magically done to him. No counterfeit memories, no counterfeit feelings. So her goal in this, it was to deceive Jon. To not only sabotage Jon fixing this problem, but to deceive Jon into not knowing that it had failed because she had sabotaged her. Because she knew Jon was a smart guy, a smart girl now. She knew Jon would find a way out of this if there was a way out of it, and it was really looking now like there was an easy way out of it. But she didn't want that. She wanted Jon to be stuck as a catgirl forever, she wanted to be one herself forever, she didn't Jon to know it was her doing, and then who would be there to make the BIG SACRIFICE (wink) and accept her anyway? Karyn, of course. She would be like "Jon, I've loved you for a long time, but even though you're a girl now, and we're stuck as furries forever, I'll still accept you anyway, so cheer up, let me comfort your weary soul, you still get the girl in the end." And then she would rock Jon's world and make her so happy to be a girl that she'll break down in tears and thank the pussy gods. The question was, how could she do that.
"Ok stone nya," she started, pawing the stone again. "I wish that if anyone asks later nya about earlier wishes that have been made nya, that nothing I say in the next hour nya will be part of that nya, that you'll lie to them and not mention the wishes I make nyow nya, and that includes the one I just made where I slowed down time in this room nya."
She sat there and pondered what next to say. "I wish that all changes made with the cat gun, nya, would be permanent nyow nya, and that includes the times it has been used today nya. In fact nya, I want it to have the maximum possible effect nya, since it already has been established that it changes whole families nya, I want it to change vast swaths of the population when it is used just once nya. It can't be the whole human race nya, since Jon didn't immediately change when he shot me nya, so the cat would be out of the bag nya, but let's say that 70% of the human population has already been changed nya, and changed through all history nya, so REALLY extended families are affected nya. And if it's ever used again, it will be even more extensive nya, maybe the next time it is used it really will be 100% of the population nya, and that they'd all be catgirls nya, let it obliterate the male gender nya. Nyot that I have anything against males nya, I'm not killing them after all nya, just making them into females nya."
"Nya, how do I make this believable though nya. I know nya. I wish that when the repaired gun fails to return us to normal nya, when Jon inevitably asks for the information on why it fails nya, that you will tell HER nya," Karyn reveled in saying 'her', "that it was because one of the magical components was damaged in such a way nya, that the magic within it was dispelled nya, and so the only way to repair the gun was to replace that component with a different one nya, and because it was a different component nya, the whole gun counts as a new gun nya, and since it has to be THE SAME GUNnya to change you back nya, that's why it won't work nya, since it is a different gunnya."
She picked her paw off the stone and licked it. "I think that's it nya. I think I've done it nya. Maybe I can set a better explanation for the girl thing nya. I wish that the explanation for why everyone turned into a catperson is a girl nya, is that the gun was set to female mode nya, but the way it is squared away with the retconned world history nya, is that us catgirls can reproduce with other catgirls nya and have been with the human race since antiquity nya, living alongside regular humans nya, maybe that tens of thousyands of years ago when there were neanderthals and regular humans nya, there were also catgirls nya and they got along with the regular humans nya and forged civilization together nya. Nyeah, that sounds pretty good. Nyokay I think I'm dyone here nya."
Karyn mostly sat around and twiddled her paws for the rest of the hour. She was titillated by the fact that she couldn't really even play with herself properly with her paws, lacking the dexterity to do this. But that she had other options. Her tail, for one. And with newfound flexibility, her tongue. But she liked having her front paws on her middle set of breasts, so it had to be her tail. It was made easier, fantasizing about Jon. She was elated with her new body. And that Jon was stuck in a similar one.
The time was up, and sounds resumed from the bathroom. Jon finished up. Karyn was in the clear. Jon was none the wiser, and would never be.
Of course her plan went off without a hitch. Jon failed to restore Karyn or herself. A few quick looks at wikipedia showed the vast extent of the damage, of the nature of this new world, this catland. Jon apologized so tearfully, Karyn was just eating it up, Jon was so cute. Karyn graciously accepted Jon's apology. She was going to have her in the palm of her paw.
"Jon, cheer up nya," she said later that evening. "At least we're pretty cute nya. And I've got my red hair back nya, just the way it's supposed to be nya, so there's that nya."
"What a consolation prize nya," Jon lamented.
The time was perfect.
"Jonnya, I was trying to find the perfect time to tell you this nya, but I guess there is no perfect time nya. Jon, I love ya nya. Totally in love with ya nya. I've loved ya for a long time nya. And I don't care if you're a boy or a girl nya, I want to be with you nya. Regardless of whether you're my boyfriend or my girlfriend nya, I want to be your girlfriend nya. What do ya say nya?"
Jon was stunned by this admission.
"That's... reaally nya?" Jon asked.
"Really truly nya," Karyn purred.
"You'd even accept me as a girl nya?"
He... she... seemed to ponder distantly, in moderate sadness. "To hell with it then nya. Karynnya, the reason I never made a move on you was because I'm gay nya."
"Nyah!?" Karyn shrieked. Talk about the gift of the magi, she thought to herself. "So I have no chance nya?" she cried.
"I didn't say that nya. You just said you'd make the same sacrifice nya, being with me even though I'm a girl nya, if you can accept me either way nya then I should be able to do the same thing nya. So how can I not nya? If I'm honest with myself nya, I love you too nya, I love you more than anyone else in the world nya. I don't know if I'll ever truly be happy nya, but 85% of the population is female nyow nya. If only 30% of humans are still human nya, even half of them are girls nya, and how many left are gay men nya? My options are pretty limited nya. And I can't let you nyot get your happy ending because of my selfishness nya. There are worse things in the world than being your girlfriend nya. Maybe I should just wish with the stone that I like girls nya, that would be the easiest way nya. That's not so bad nya, everybody wins nya, everybody gets their happy ending nya, and I wouldn't really be a different person nya."
"Eh," Karyn thought to herself. "I'll take it."
"You're such a good girl Karyn nya," Jon cried, "I'm so lucky to have you nya. I can trust my future to you nya." Jon snuggled her face against Karyn's, tears flowing. "Forget what I said about being gay nya, you're the most wonderful person in the world Karyn nya! I don't care how many gay men are left in the world nya, who needs them nya!"
"Yeah," Karyn thought to herself distantly. "That's me all right. The most wonderful and trustworthy person on Earth." She hated herself more than anyone else in the world in that moment.