The week moved rather slow for Jeff. Dean decided to stay home, so he had more time for Spike. And this time was used to either play with him, or use him for his needs. Jeff was still furious at Dean the first two days, but slowly something crept into his mind, unnoticed to him. He got calmer, soon not angry anymore.
On the fourth day Jeff begun to desire Dean, already calling him master or mate mentally. His situation was accepted, and by the sixth day a bigger part of him wanted to stay in this suit after the week was up. And with each time he got a load of Dean's cum his desire for Dean and staying as his dog slave increased more.
Dean had not once called Spike Jeff in the whole week, just as if Jeff didn´t exist anymore. He got a couple of BJs a day and let Spike lick his bare feet clean. Other times Spike licked dropped cum from the floor or cleaned Dean's shoes and the house with just his tongue.
Dean slowly increased his tasks for Spike. While the cleaning of his naked feet happened from the third day on, the cleaning already started at the first day. After the fourth he tasked Spike to disrobe him with only his mouth, only opening his belt as that was impossible for the dog. The sixth day was the first time Dean took the tail-plug out and used Spike's ass before sealing his cum inside again.
And Spike was ever so eager to serve Dean's commands that Dean already didn´t want Jeff back. He had tried to reset the timer, but that didn´t work. What he had changed was that after Jeff changed back he couldn´t use the chronivac due a password Dean set to it. If Jeff returned to his old self Dean would see how Jeff reacted before restarting the changes, this time permanent.
Dean watched the timer as it was on the last minute, ticking down. Spike just sucked him as the timer reached zero. Spike changed back into Jeff before Dean's feet, the suit growing along with him. When Jeff was himself again, at least in body, the suit slowly changed back to what it had been. So after five more minutes Jeff sat there, wearing a set of shoes on both his hands and feet, had his jeans pushed half way up his ass, his jockstrap around his cock and balls, the now stained shirt on his torso and his dirty underwear covered his face.
Dean was surprised that Jeff didn´t make any move to get the clothes off. So he asked carefully: „Uh, hi Jeff. How are you?“
Jeff's somewhat muffled voice answered: „I´m great, mate. Just my hands feel cramped in this shoes.“
Dean looked surprised as he continued to ask: „You are not angry at me?“ He thought that maybe Jeff didn´t remember the week, but that still doesn´t explain why he didn´t remove the shoes and underwear.
„Why would I be angry, mate? We both like this game of master and slave, and I was your dog for the past week. I just wish the suit hadn´t changed back to this uncomfortable parts around me.“ Jeff replied, sounding first happy and than slightly annoyed at the last part.
Dean was even more surprised. Had the chronivac changed Jeff's mind or what was that? „So you want me to change the things back into your suit?“ he asked slowly.
„Yes“ Jeff nearly screamed in joy before hugging Dean's legs. „Please do that, I want to be your dog slave again, master. But please don´t use the cock cage again.“
And so Dean changed not Jeff back into Spike, but remade the suit out of the clothes he wore, which made Jeff really happy. Only the jockstrap remained unchanged, at least for now. Jeff even liked the idea of being called Spike in this form. And so Jeff remained Dean's gay dog slave Spike after he changed back.
Dean later looked it up, and found out that his constant use of Spike to release his cum had made Jeff accept his new role, and the constant smell of Dean's cum had made him Jeff's master. But as he liked the situation himself he didn´t try to reset Jeff's mind, also fearing what Jeff would do then. Even if he couldn´t use the chronivac, he could still do other things.