Jen stood there holding the phone and wondering if there was any truth to what she had just heard. She hung up the phone and continued looking for her other sock, finally finding it she sat down and went to put it on but noticed that her feet had both fallen asleep. She looked at them and noticed that they looked a little swollen, and were still swelling, her skin hardened and turned black, finally finishing in finely manicured horses hooves. She shrieked as her legs began to lengthen, her knees popped as they changed direction,
Her thighs expanded, and her ass began to swell, she stood up and watched in amazement as her legs and rear expanded larger and larger. Her body started to shift more, her spine moving with her pelvis into it's new position, she finally recognized the breed, she was turning into half Clydesdale, her ass finally stopped growing, nearly five times as large as it was. Jen looked in the mirror and saw her new and ridiculous body, from her waist up she was normal, but now she had a full sized Clydesdale's rear quarters for her waist down. She sighed, and then felt something else changing, her marehood was sealing up, she watched in shock as her new balls dropped, they were the size of grapefruits, shortly after that her new manhood came into being, it's sheath ending just at her belly button.
"Great.... I'm a guy now." Jen sighed, after a few minutes of hesitation she decided to touch her new cock. "It's mine, I might as well see it."
Jen poked her cock's sheath, she didn't get much reaction to that so she started to caress it, the feeling was oddly satisfying. She felt a new sensation as her cock came to life, once it was aroused it shot out, eager to be played with. Jen screamed a little at it's reaction, her new cock stiffened to it's new length, it reached past her head, it's thick shaft wedged between her generous DD's.
"Holy shit... I'm... huge!" Jen started to cry, not only was she a freak, she was a massively endowed one, bigger than any horse on the planet, it had to be at least four foot long. Jen tried to sit, but found that she couldn't with her new body structure, she went to crouch, her legs bent underneath her, she felt like she was sitting and laying down at once. The poor girl sat looking at her new cock, trying to figure out what to do next.