He was just like expected. Half human, half bull. Wearing nothing but a loincloth too. You we definitely not complaining about that though. He was perfect! Well, his package was at least. The flimsy rags could do little to cover his big bull cock and massive pair of nuts. They had to each weight as much as you do, you reasoned.
The big guy approached the counter and wasted no time in asking your uncle about what he wanted.
"In need something for my dick. Something to keep it warm at night. And preferably something that isn't just like, a blanket or something. I want it to feel good when I use it. The wife is expecting, so sex has gone down a bit as of late." He says bluntly.
Your uncle ponders his request for a bit, then looks over to you and smiles. "I have just the thing. She came in fresh this morning. Thus here is Pinky. She is out newest product. A fully customizable fuck doll. What makes her extra special, is that she is a living being too. My niece actually. So because of that, she is not a buy and keep forever product. However you just need something until your wife is no longer pregnant correct?" Your Uncle is giving his best sales pitch while standing literally right in front of you. And you are not sure if you are more horrified or aroused by the thought of being this minotaur's cock warmer. Not that you really have a choice anyways.
"Yeah, I guess. So she will really do the trick? I don't know, she has a bunch of these extra parts to her." The Minotaur says, poking your arms and legs.
"Not to worry, those can be removed, or swapped out if desired. We could even make them into something else." Says your uncle.
"Oh? Like what?"
"Hmm... Oh! Let me show you." Yiur uncle says, pulling out a device and pointing it at you. He clicks a few buttons and a beam shoots out and hits you. Your arms and legs slowly shrink back into your body, until they start rounding out. The finally finish once your legs and arms become 2 more pairs of breasts. 2 breasts on your hips, and one breast per shoulder.
You fall backwards, as nothing is supporting you anymore, and land on yet another pair of breasts, poking out of your back that you didn't know about until just now. Your pussy then spread open until it was a hole wide enough to fit over the minotaur's huge cock. Your own cock and balls just moved up a bit on your body so that they would be out of the way of your fuck hole.
Your fuck hole then started getting deeper and deeper, hollowing out your insides until it was just a few inches shy of your neck. It connected right to your throat, creating a small passageway to your mouth. This is so when the Minotaur cums inside of you, it can flow up your throat and out your mouth. You could feel all 8 of your breasts swell up a bit, all becomming quite large for your size, especially the two on your hips.
"There, how does she look now? I'd say she makes for quite the great cock warmer." Boasts your Uncle. The minotaur looks you over. "Can't we change her face? Having a kobold's mouth is kind of, off putting, for something my dick is going to be inside of." He asks.
"Certainly! Just a minute. Which face would be more to your liking?"
"Hmm, does she have a more human one?"
"Well, I can make one for her, but it will take just a minute. What colors would you like for her, or should I just keep her entirely pink like she is now?"
"Give her your skin color, but with a pink hue to it, and maybe make her somewhat transparent. Oh, and long black hair is my preference, if possible. Her having a pair of cow ears and horns would be perfect. And if it isn't too much trouble, having a comfortable strap to secure her with over the night would be great too. If she has all of that, and she can control her insides to pleasure me, she will be exactly what I am looking for. So, can you really do all of that?" Asks the Minotaur, who honestly is more than impressed with how customizable you already have been shown to be.
"Can I do it? Please, doing all of that is a piece of cake. Just give me 3 minutes, and she will be perfect." Your uncle picked you up and carried you into the back room. "So, you excited?" He asked you while he sets you down on top of a table.
"Uh-huh! I really wanna be his cock warmer! My pussy needs his dick!" Your moan as you squirm about helplessly on the table. Your Uncle makes all of the requested changes to you, even piercing your hip boobs and shoulder boobs with large rings, which turn soft and blend into your nipples until they actually become part of your nipples. You can feel with every inch of their surface too. He then clips on 2 straps which will be used to secure you over the night to your new ring nipples, crossing them in the back as they went from each shouder ring nipple to the other side's hip boob's ring nipple.
Your body returned to being human shaped, just only as a woman's body, and not your original one, as that no longer was possible. You could at best be a futanari, but for all intents and purposes, you were stuck as being female for the remainder of your existence. This was fine with you, as that meant that you could always be fucked in your pussy. Your Uncle showed you your new face, saying that this is how your human self now looks like. The woman who you see reflected is very cute. She would have been just your type if she was not already yourself. Plus the long, straight black hair really was doing it for you. And it matches your soon to be owner's hair color, which was a nice touch in your opinion. Even being semi-transparent was turning you on, since you would be able to see his cum flowing inside of your fuck hole and out through your mouth drain. Even the cow features looked good on you. Like if it were only natural for you to have them.
"Ready Pinky? This is the last we will see each other for several months maybe. However as a fail safe, if you are gone for exactly a full year, you will be teleported back here immediately. You also are completely indestructible, so dont worry if he starts getting a bit rough with you. This is your job, so you better be the best cock warmer you can be, since this is all you are now. You are just a cock warmer with a personality." Says your Uncle.
"Don't worry. I am a good girl. And, I already know how to be a great sex toy too! I really want to do this. Thanks for letting me do it Uncle. I would hug you, but I can't move on my own very much anymore, nor do I have arms to do it with." You cheerfully exclaim. Your uncle picks you up and gives you a kiss on your new, very cow like, nose ring. "This will have to do for now." He says and brings you back out to the store front and hands you over to your new owner.
"Hello sir, I am Pinky, your personalized cock warmer. What designation should I refer to you as from now on?" You say, formally greeting your new owner.
"Heh, she has a pretty cute voice too. Thanks man, I will take her. How much do I owe you?" Says the Minotaur, ignoring you completely. A contract is then made and signed. And you exit the store in your Owners hand. There you once again repeat your greeting.
"Huh, designation? Uhh, I guess call me by my name? It's Hul."
"Understood. I will call you, 'Master Hul' from now on, is this acceptable?"
"Just using either Master or Hul is fine. I am not too picky about those things."
"Acknowledged, set up complete." You chuckle as there was not any actual set up program, and you were just having a bit if fun with your new owner. He just shrugged, thinking it was just a normal thing and continued on his way home.