Amory had decided that living in the city could be interesting, and if he didn´t like it, he could still use the app to go back into the wild. The real question now was, would he be family to Eric, or not. It would be perfect living in the same house as Eric for him becoming his mate, but he also knew a relationship between siblings wasn´t normal. So, if he wanted Eric as his mate, being siblings was out of question. Even being a cousin or another kind of relation would be bad.
Becoming one of his friends only would solve that problem, but he would again be living alone until he got Eric as a mate. And if he joined one of Eric´s friends, that would make it weird if they were different animal anthros. So, what should he do?
He then remembered another idea he had. It would solve the problem, and with a bit of altering, it could be normal to everyone. Yes, he could do that, and all would be none the wiser. And the only one in a worse living situation, at least to the one himself, would be Eric himself. Not that he would complain after the adjusting.
With a grin down at Eric, Amory started to work with the app. First, he copied Eric´s data from his old human life, which had altered as he become a jaguar-anthro permanently, over to himself. It gave Amory a backstory he would need. He replaced Eric in all relationships that way, so Greg and the others were his friends instead of Eric´s, same with his family, who was now Amory´s as well.
That left Eric alone to everyone he knew but Amory. While Eric still knew everyone, they wouldn´t know him now. He would be a stranger to them all. So, that was tackled by Amory next. He edited Eric´s life like he wanted it to be. As the thought had been of Eric being his pet-mate, he edited his body first, making him nearly full animal. It was the state Eric had made him first, an animal with human intelligence. The only edit otherwise was Eric´s gender. To be Amory´s mate, he would at least need a pussy, but Amory wasn´t cruel enough to change his gender to the complete opposite. Therefore, Eric would be both, having a pussy just behind his cock.
With the body changed to Amory´s wishes, a few smaller edits to Eric´s mind. He liked Eric enough to not simply make him a dumb animal, beside he himself would find it weird to have a full animal as a mate now. And he would miss the conversations with him. So, Eric would stay himself mostly. He gave him a few of his own old memories of living in the wild, though.
One edit was his speaking ability. While Eric would still speak normally to himself, only Amory would understand him. To others, it would be more animalistic sounds than real words mostly. To them, it would seem Eric was trying to learn speaking like a human, but wasn´t that successful.
Another was of him knowing, deep down, he always had been both genders, but acted more like a male. That way, Eric would be shy to admit having a pussy, would even try denying it all together. It would also make it more fun for Amory to “break” him in later. He could feel his own cock going harder down there. Maybe he would have Eric suck him off when the changes finished.
Also, Eric would slowly accept being Amory´s pet-mate and nothing else. He would fight Amory over his decision to “steal” his life from him, trying to get everything back, but ever so slowly, he would think things were normal that way. Oh, he would still know everything, deep down, but it wouldn´t be as important as his mate.
Lastly, Amory made sure that Eric wouldn´t attack him or others, being a completely tame animal. He could still plan to attack and all, but just wouldn´t go through with it. It wouldn´t do for Eric being put down for being aggressive, and Amory wouldn´t want to fight him for dominance. Eric was submissive to him already, but even than he theoretically could attack.
After also editing in that it could be normal for animal-anthros to have an animal of their species as a mate, Amory grinned down at Eric again. As soon as he saved the changes, he would take over Eric´s life, but Eric would still be with him. The only question was, should he wake Eric up for the changes?
But he decided not to so. It would make the transit for Eric harder. If he had changed after sleeping, maybe Amory could put some peace into Eric for thinking it all was a dream? He could even use an excuse that Eric had wanted to “see” Amory´s memories as a dream to know his viewpoint of life.
Amory made a final note in the program for Eric to stay asleep for at least another ten minutes after the changes finish, and that reality would change to fit the changes made, then saved them, enabling them to happen.
Before Amory´s eyes, Eric´s form changed in the opposite way of his before. His bones crack loudly, and Eric winces in his sleep. Amory had forgotten to make the changes painless. Eric would sure be sore when he woke up. His hands changed into fore-paws, fingers shrinking away, giving it a more feline shape than before. That he gained a pussy behind his cock couldn´t be seen, but Eric squirmed a bit at the uncomfortable feeling down there. Within a minute or two, Eric was now a fully feral jaguar in body.
Amory wobbled slightly as his head was attacked by the copy of memories he now got from Eric, suddenly knowing how boring school could be, what his friends liked or hated and so on. It didn´t overwrite his memories, but they laid now beside them, and he could access everything in them. He could understand why Eric had hated clothes, and felt he wouldn´t like them either. He himself only altered a little bit, as he lost another year of his life. Eric had made him 16 by his own wishes, but from the “backstory” he now owned, he was Eric´s age, meaning 15 instead.
When everything was finished, Amory smiled down at his pet-mate, smelling his new pussy. Oh, how much he wanted to fuck his mate right now. But it wouldn´t do. For one, it was no fun with a sleeping mate, and second, he wanted to take it slower for Eric’s sake.
Amory caressed Eric for the next minutes, enjoying having his pet-mate with him. Soon, he would wake up, and most likely complain about what Amory did. So, he enjoyed the silence he had right now.