Jack moaned as he continued to thrust, his stouter penis he would slide back to where it might drop free, but at the same moment, he shoved his penis seemingly ever deeper. He was enjoying his mating with May, as from her occasional soft bray it seemed she was enjoying Jack quelling her beastly urges. The campfire was dying away from no new branches added to the pile of those already burnt. A three quarter moon shone its blue light to give the lovers enough light to see, but Jack had his eyes closed while he stayed mounted and thrusting.
"Go for it, help me out Jack," May thought as she could feel her cursed body begin to react from the animalistic mating.
Jack was knowingly becoming near to being frantic for want to breed with this female donkey. As he rose to feeling a climax, May brayed, she knowing that her lover was feeling his own body conforming to make it easier for him to mate.
A quivering sensation arose in the scrotum on Jack as he felt a surge of semen rush along inside his penis, as it then spewed into May. One surge went to two surges, to three, to a fourth until his balls ached something awful.
"May, May what am I feeling inside of me, "Jack bemoaning his weird feelings, arising in him concerns about if he were becoming as more a donkey and less a human. It happened that as he began again more as even greater urged thrusts,he turned his head to the right and peered down.
"Oh damn me May, what is happening to me," Jack grumbled, he seeing that from his changed and by then fur covered groin, the much darkening skin and growth of body fur was spreading down along his broader thighs. The skin color change and fur growth was also trailing up along his stomach and back, making Jack look as if he were soon to be similar to how May had changed.
Something drastically sensual feeling came over Jack and he began a rush of fast thrusting, that made May bray loudly.
Thrust, "ouch," thrust, "ouch," thrust, "ouch," as this pattern continued for a few minutes, or until Jack felt something weighty touching his rear pucker. Jack realized he had grown a tail, his donkey tail, along with his buttocks becoming strong muscle, but less broad and more as narrowed. He felt the tail swishing and plucking at what until then was sandwiched between human buttocks, was then showing itself to the light of day.
Panting as he was thrusting, going for a third orgasmic thrill, and Jack spoke to May about what he felt and told her he found the sensuousness as wildly desirable.
As his arms and hands had seen the changing first, the mating worked to arouse in Jack a desire to give May what she wanted. Jack wanted what May did then, and would have said more had his lips, mouth, and nose begin to grow, merging, forming as part of his face a donkey style muzzle. While urgent waves of lust flowed from Jack's mind, his body reacted accordingly, causing his legs and feet to hunch and lengthen, while feet became those common for a four legged stance.
Somewhere about then Jack fired out his third might load of semen. This load was almost painful to Jack, as the semen felt denser, creamy, and the force coming from his bigger balls only added to the sense of rush he so enjoyed.
Jack went to cry to May, as what he tried to say came out his mouth as a ragged gutsy bray.
Jack shook his weighty head and tried a second time to speak to May, but he brayed again.
Horror struck, Jack took a stride step backing away as his still spurting donkey cock sprayed his semen at the not so furry buttocks on May. Jack wavered for a moment of him standing on then hind legs and solid hoofs, before he felt the necessity to let go and fall to begin standing on all fours. "Hee-haw," Jack cried, as he realized for sure he had changed, and changed fully, being then as a Jack donkey.
Meanwhile, May turned and flopped down on her cute again fur-less butt. Her tail lay on the ground beside her, it as no-longer attached to her rump.
Jack stood there wiggling his long furry ears, swishing his nervous tail, licking a large as thick tongue to moisten his dry lips. He knew what they had done, and from the sex he changed and was a donkey. May had reverted back to her being that lovely, as sexy shaped teenage girl. She sat there on the ground and smiled up at Jack, making his feel as he was a Jackass.
"My oh my, but Jack you did yourself proud, as have the last few I let mate with me, your strong physique served you well, bringing on your transforming to become as a Mammoth Donkey Jack!" May said as she announced to Jack of how he had changed species, while grown to be twice bigger than what May was when she would stand being a donkey.
"I would ask for you to stay here on the farm, to live at the barn, work in the fields and grove, being for me as my lover when the urge takes me to be again as able for us to mate. Hear me, as being a donkey is not a bad life, you sleep well, rise in the morning, eat a free meal, drink clean as cold water, piss or crap when you feel the urge, and whether mating with mares, donkeys, or me, you will live a life filled with wild and sensual sex!" May explained what Jack could look forward toward, as she added, "However, if you act nasty, try to bite, or injure someone with a kick, you will be sold at auction!"
Jack stood there feeling his huge donkey cock swaying, feeling the night breeze, it still dribbling semen, and he was powerless to cause his body to revert back to being again as a human.
"Hee-haw," said Jack softly, as he strode closer to be near to May. Jack ducked his furry block bony head low and snorting, he then sniffed at her pink nether lips; reaching forth his tongue he gave those cute pink lips a slathered lick of appreciation.
May moaned and let Jack tickle her privates, before she got up, stood up, and patting Jack at his furred lower jaw, she said, "Come with me, and I shall bed you down in the barn for the night. As after your bedded down I shall return here to your camp and remove any as all traces you were there. I want you for me to be my monthly lover. Yes monthly, as women have their periods, mine is more my transforming, becoming a donkey when I lure young male humans to their beastly doom.
Yup, there will be others, but you if you love at me, you I would have daddy keep here on the farm."
Tail swishing as Jack walked, May leading him to his different life, maybe never again he would be human and having future plans, that but a vague dream now he was May's donkey.
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