You lie on the ground bloated beyond belief, full of Minotaur semen. You belly and intestines gurgle with the fluid. When you burp, you taste the beast's come and you're beginning to like the taste. At your other end, the magic plug seems to be massaging your hole and your hole seems to be reacting to it as though it's being taught to milk a cock. Your ass is rhythmically pulling and squeezing on the plug and you can't seem to stop from doing it. The plug seems to be training the muscles. You rub what you can of your huge gut, it feels so strange to be so large. You fall asleep.
Many hours later you awaken. Your ass is still milking the butt plug and you can tell the muscles are stronger. Your gut has reduced to just a serious beer belly, your body must have absorbed most of the Minotaur come.
You notice you've become incredibly hairy, but not like animal fur, at least not o n your chest and belly. It seems those areas are still human. Your bottom half is changing, becoming decidedly bovine you realize as you feel the small slip of a tail that's beginning to grow from where your spine used to end. You're feet are changing and you can't get up on them because it hurts to do so. Your torso is densely covered in human chest and belly hair. Your arms, shoulders and the backs of your hands and fingers are also hairy.
You're much more muscular than you were before and you seem to be a foot taller than before your sexual encounter with the Minotaur. You reach up and feel your face and discover a full beard has sprouted over night and is of medium length.
Between your legs, your cock seems different: very different. It's changed shape and it's beginning to attach itself to your lower belly. You guess that you're growing a sheath. You touch it and are rewarded with a wonderful sensation. Your cock grows out of the beginnings of it's new home and you marvel at the mottled bovine cock. It's HUGE! It takes both of your strong hands to satisfy it. You pump up and down on your new member and quickly realize you're going to come. You bend your head just a little, covering the head with your mouth and you rub your shaft faster. You are rewarded with gobs of thick, sticky white sperm shooting into your mouth. Yesterday, such a thing would have disgusted you, but this morning you thoroughly enjoy the taste; it reminds you of the wet belching you were doing yesterday and the taste of the beast's come.
It is then, you hear him chuckle. You didn't know such a huge beast could move so quietly. All the clomping around yesterday must have been meant to lure you, to give you something to follow.
"Ah! Beautiful changes! You like the taste of bull seed already, I see. Yes, your balls are no longer human, they're making fine, thick, creamy bull sperm." The Minotaur growls in a deep voice obviously pleased by what he sees. "Yesterday, I taught your ass how to receive my maleness; today, your throat will be schooled." You're eyes bulge in shock and then the thought of tasting that come involuntarily makes you lick your lips. "Oh yes, it would not do to let you go hungry when I have such an overabundance of seed to feed you. But before we begin, I will tell you why I am changing you and your ultimate fate. I have spent centuries alone here. Princes and kings, scholars and mages have all paid me tribute and that was fine... for awhile. But now, now I seek a mate and you shall be that mate."
"No!" You cry out, "I don't want to be a cow!"
The Minotaur pauses and there is an honestly shocked look upon his intelligently bovine face. Then he begins to chuckle, then snort, and then out and out bellowing laugh. You begin to weep.
After he settles down he lifts your chin and you look him in the eyes.
"You aren't becoming a cow, you're becoming a Minotaur... a MALE. Minotaurs are always male, it's why we take maidens when we want to breed; and I’ve done that. Unicorns also take maidens to breed because they too are all male. Do you mortals fail to read of us in your modern age? It amazes me how little you know. No, I don't simply want to breed; I want a life mate. I want a powerful male that can please me in the same way I please him. You are changing into my mate and soon, we will explore the pleasures of our strong bodies. Now, open your mouth, I need to feed you again."
You don't know why, but you do as you're told. You open your mouth and take the stiffening bull cock into your mouth. He spurts into your mouth almost immediately and you swallow eagerly.
He pulls out of your mouth and says, "Just a sample. You won't be able to take it all until your throat changes. You could suffocate now and we can't have that, can we?"
The Minotaur easily lifts you onto the padded lounge and positions you. He pulls the magic butt plug out and puts three meaty fingers into your hole. Instantly you ass muscles suck on his fingers.
"Good! I paid a mage a very large sum of money to create this little gem. Of course I had to test it out on him. It worked quite well and the mage, indignant at first, was pleased with the new skill he acquired with its use."
The Minotaur teases your opening with the head of his enormous cock and your ass twitches like mad. Deep within you, you surrender to your desires and moan as he begins to penetrate you.
Soon he's fucking you and you feel that familiar pumping as the sperm flows into you with a constant stream.
"I paid a handsome sum for the knowledge of transformative potions that allow me to change you." He grunts as he thrusts into you, "That grape I gave you yesterday and the wine were an activator, a catalyst, nothing by themselves but very important to the process. The enhanced semen production potion I drank and transformation potions that affected my sperm yesterday will assure me a weeks worth of these kinds of matings. When I have filled you with my metamorphic sperm the seventh time, you will be as I am and you will have grown to love your new body and be grateful to me for changing you."
Your belly is distended and it keeps growing. Soon you have a beanbag belly again and the Minotaur begins to withdraw from you. This time you moan in pleasure and your ass tries to hold onto him as long as you possibly can. He inserts the plug again and it continues to train your ass muscles.
He turns to leave, leaving you draped on the lounge and you moan, "No, don't leave me. Hold me, my love."
"What? You must be changing faster than I thought. The effects to your emotional and mental states are progressing far faster than anticipated." The Minotaur says.
"Hold me close, please." You say and you mean every word. This is your lover now and you want him to be near to you.
The Minotaur moves onto the lounge and embraces you. You kiss him and caress his hairy muscular human chest and he holds you as you drift into sleep.
The next morning you wake... You're further transformed... your maleness is even larger and your balls look like small lemons in a furry sack.
"Awake, I see." The Minotaur says from behind you.