As Courtney slept the cursed semen infection of her body continued according to what Henry the stallion had told her.
Graying of her skin raced to engulf her, changing her bodily hue to being a deep dark black. As her skin blackened, so too its texture and density changed, toughening as billions of hair follicles sprouted. Equine body hair grew and flourished, building a pelt worthy of one champion grade Mule. Soft tissue extremities saw transitions first, her ears, lips, and genitals.
Courtney slept in a deep comatose realm of not dreaming, she and her body were changing, some mental, most physical. The infection would if the victim was awake would continue but at a slowed rate due to an alert mind not liking of what it saw happening. Asleep, and the specified victim was unaware, and did not fight to retain their humanity.
As her ovaries changed, becoming for her then as testicles, a scrotum formed, as her vagina collapsed, becoming new muscles. Her urethan liquid system began to grow, extending, as a equine sheath formed around for protection of a highly sensual new appendage. Courtney stirred as she slept, not realizing that her physical gender had transitioned; as if she were awake would pained her greatly.
Muscular toning began, as a woman she stood upright and walked with two legs, her becoming a Mule would required a muscular reconfiguring, the like as if awake she would know more pains. As her pelvic bone grew, so did her ribs, spinal vertebra to expanding her torso; as internal organs, the digestive system increased of size and length.
Buttocks and thighs were conforming along with skeletal transitions, her thighs, shins, and hind hocks would redefine her stance. Human foot bones grew longer, bone density enhancing, and toes merged to form a single toe hoof, did her fetlock joints bloom.
Courtney stirred as she slept, rolling to her lying on her back as did changing legs become as her different hind legs. As the groin deepened, the scrotum grew large, her new sheath and the penis within maturing of each their form. A tailbone solidified when a human, became flexible, as grew, adding segments, new skin and coarse tail hairs. Her tail grew to twenty-six inches long, the hairs formed a thick brush, similar to a proper tail of a new foal.
Her anus, which when human set recessed, tucked between to pliable buttocks, saw the drastic changes. The blackened skin and equine buttocks caused the anus to protrude, extend, bloat, becoming puckered. Meanwhile, facially, the skull began to change, lengthening her jaw bone, increasing nasal and eye sockets, but decreasing the brain cavity, restricting the allowed size of her brain and limiting some mental function.
Twelve hours of comatose slumber, and Courtney slowly regained a conscious state, but with awakening, she did some stretching, feeling renewed, refreshed, a yawned, licking her thick tongue across massive molders, and feeling an open space between her incisors, front teeth and those she used to mash and munch. As searching hand went inquire why her mouth felt different, her fingers met the thick lips and muzzle/nostrils of a male Mule.
Horrified, and Courtney leaped from her bed to stand and walk toward her full length mirror; only to discover her changed legs, feet, hoofs and stance as of her partially then an equine animal.