"I really wish I had a way to spread this! It's so hawwwt!" said Zoey. What was going through her mind had been a little worrying to her at first, but then her normal mind was becoming totally repressed. In a small corner of it, something told her this was wrong but the feelings of ecstasy she got from cumming were driving her now and she had to let other people feel how good this felt, even if she had to make them. Images were running through her mind, images of rooms full of half animal-half-human sex fiends like herself, women and men having sex with inhuman, men with long ebony cocks penetrating sloppy wet black as night animalistic pussies, women moaning and crying out and even braying like herself as every inch of their insides were penetrated and they squirted their juices around the thick invaders. She started stroking herself again and closed her eyes to fully immerse herself in the depraved image of the beastly orgy.
"So it shall be...." whispered the voice in her head. "Any of your bodily fluids can now be used to spread your condition... Use them wisely... Ahh and one more thing... You may not be able to make it as you are now... Therefore I am planting a curse mark on you... Press your thumb to it and you will return to who you are meant to be... Though your lust and animalistic taint will linger no matter what.... You are the first...Donkeyslut... from here it is up to you..." And with that the butt plug in her ass started to vanish, disappearing from her anus as it faded from existence.
That was enough to get Zoey's attention, and she reached back to her ass to make sure she really had felt her asshole closing up over nothing. "Huh. Kinda funny when a thing just disappears but then I guess this whole day has been a little funny." Her brain was not bothered anymore to worry about how something as strange as that could have happened.
At that moment a searingly hot and painful sensation erupted on her right wrist. She screamed in pain and grabbed her right arm with her left and held it. From what she could see, an inch-long black mark was appearing on her wrist that began to resemble an erect equine phallus. As it appeared, she could hear and feel pops and cracks within her body as her hooves loosened into feet once more and her muzzle retracted into her normal human mouth. Her tail folded into her tailbone, her ears shortened, and eventually, all that remained was her beastly phallus, its head peeking out from the top of her sheathe still. Her mind began to uncloud, though she still felt very horny.
Just then the door opened downstairs, she could hear it from where she was in the bathroom. A voice called out "Hey Zo-Zo! I got food!"
Her cock twitched at the noise. It was her roommate, Erika. The male sex hormones in her system kicked into overdrive, and thoughts of ravaging her roommate began to enter her mind. She pushed them away as much as she could. But she was now a Donkeyslut, and try as she might these feelings and thoughts had come from within her, from her wish that she had made when she first wished with the butt plug in her that she could be a jackass and have sex with whoever she wanted. They were who she was. And a smile came to her face as she realized this fact and called out to her friend.
"Coming! I'll be right there! Just finishing up in the bathroom! Oh and by the way, I have something for you!"