The cool liquid pours down your throat and you can't stop suckling. Miranda moos in pleasure, her wetness dripping down on your stomach. Fur spreads from your groin up your torso, and in a short time you have a thick coat of dark brown hair on your front and thighs. You reach out to pull Miranda closer, and see your hands are changing.
Something has fused your index and middle fingers together, and then your ring and pinky fingers. A shiny black substance coats the end of your conjoined fingers, and your still intact thumb which is now twice the size it was originally. Again, your mind doesn't really register that something's wrong, and you pull Miranda closer as you continue to drink her milk. The sweet taste fills you with pleasure, and your tail is lashing behind you out of control. You momentarily stop drinking to bray with delight, your mind slipping faster and faster with every gulp of milk.
"That's it, drink it all my little calf. Drink, drink until you can't drink anymore." Miranda croons. She rocks back and forth, breasts waving above you. The teat in your mouth feels like it's getting bigger. You suckle harder, and then stop when your face starts changing. With your mouth still wrapped around Miranda's teat, your skull reshapes itself. Your nose disappears into the landscape of your new face. Huge nostrils expand, letting you breath in more and more of Miranda's heady scent.
The heavy smells in the air arouse you that much more. Your teeth flatten out, and you have to stop drinking to spit out the old ones that have fallen out. Your new donkey teeth press Miranda's nipple harder, forcing more milk out. She moans in a combination of pain and pleasure as you greedily suck her milk. Your ears stretch, pulling further and further away from your face until you have foot long appendages sticking up from your head.
Then the hair on your chest spreads up your neck, creating a kind of furry turtleneck, and onto your ears. Your now proper donkey ears twitch, picking up every sigh and every moan. A sharp pain distracts you for a second, but then subsides. In that second, a pair of bovine horns burst from either side of your forehead. Miranda is careful to avoid impaling herself on them, and lowers herself back down to let you suckle.
But your body is so overwhelmed you can hardly focus on anything. Your cock is of course erect and eager for round 2. Your tail fans your asshole, and something else. Something that should send you into a panic, but feels right somehow. Beneath your asshole, there is a new crevasse. It runs from the edge of your asshole to the back of your leathery ballsack. And as your tail fans it, you can feel it getting hotter and hotter. Your building arousal fuels the transformation, and as you get hornier the deeper the crevasse becomes. Until it isn't just a crevasse, it's a hole. A damp, warm slit that is a proper jenny cunt.
Womanly juices run down your hairy thighs, and coat the back of your balls. The smell of your own pussy sends you spinning. The only thought in your head is to do something about the heat, and you start finger yourself. You fall back into your back, one hoof hand pumping in and out of your virgin cunt. You cock flops onto your chest, and you moan as the heat spreads. Your feet are changing.
Like your hands, your toes clump together and fuse. But rather than in one clump, there are two halves. Bovine hooves rather than donkey hooves are forming. You kick out your legs as muscle and flesh bulge. Your body is so wrapped up in the heat you're barely aware of the pain from your reforming legs. If you were to stand now, you would find that you have a digitigrade stance. Your hooves are coated in the same shiny black substance, which you now know is keratin.
The final change hits your chest. Your pecs inflate like two balloons, and your nipples are tugged away from your body until they're at least two inches long. They're black, like the rest of the visible skin on your body. Your furry breasts stop growing once they're the same size as Miranda's, and you can hear, and more importantly, feel the milk sloshing around inside them.
"Now it's your turn to get milked." Miranda whispers, biting down on your newly formed teat. You throw your head back and release an animalistic moan. Your pussy leaks everywhere, and your cock is erect between your breasts. The head drips pre all over your chest, and Miranda happily drinks that up too. Between Miranda taking healthy swigs of your milk, and her licking up your precum, you don't know what's more pleasurable. But the simultaneous orgasm you have through both of your sexes is indescribable. You lie there, mind blown from the intensity and power of your sex organs.
"And just think, we haven't even gone for round 2 yet." Miranda says, making your body shudder at the thought of round 2.