**Author's Note: This is how I'm interpreting things. When the DNA Splicer is introduced, LupusAter wrote, "DNA Splicer allows the person to alter their own DNA, and introduce DNA of other living things into themselves..." So the transformative properties Liz input won't work. She would have to go back and load a different program to alter the CHEMISTRY of Jeff's bodily fluids to make them infectious.
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Jeff's computer screen read,
Target Name: Jeff
Feature: Genitals (Human) --> Genitals (Horse)
Function: Transformation Inducing (error, invalid input)
Transformation Percentage: 70% Animal (error, unspecific input) 30% Human
Method of exchange: Body fluid (error, invalid input)
Type of Body fluid: Semen (error, invalid input)
Dimensions: N/A
Morphing duration: 5 minutes
Pleasurable: Y
Alter Reality: Y
Advanced: Increase in genital size in recipient of transformation
"Error? So what's going to happen now?" Jeff wondered. Either way, he was going to find out. Jeff looked back at Liz. She was still leaning against the wall, her body shaking all over. Jeff watched as short gray hairs started to appear all over her body. Without any care that Jeff was watching her, Liz tore her clothing from her body.
"Uh, what're you doing?" Jeff asked, trying not to stare at her private parts or breasts.
"It's so fucking hot in here!" Liz gasped as even without her clothing her body still felt constricted. Her transformation was slow, since she specified the duration to be 5 minutes long. Jeff saw that aside from the fur, Liz's ears were growing too. Longer and longer until they looked like...
"Oh my GOD!" Jeff laughed as he realized what Liz was turning into. She glared at him and snapped at him to shut up.
"You... you're... jack..." Jeff said between fits of laughter. He just couldn't help himself. Liz shouldn't have messed with the program. And what's more, she shouldn't have messed with HIS body. Then she went and tried to use it to transform herself, but transforming him. Now look what was happening. Take about bad karma.
"What the hell is your problem? Seriously Jeff, are you getting some sick kick out of watching meeee-haw!" Liz's hands flew to her mouth as soon as the sound left her lips. Jeff continued to smirk as things finally clicked in Liz's brain. Her eyes were filled with shock, fear, and a little bit of mild intrigue. Donkey was close enough to horse.
"You're an idiot" Liz said, glaring at Jeff. She felt something pull at the base of her spine, and saw a ropey donkey tail shoot out from behind her. Her ass was getting quite large, and hairy. Liz gasped when she saw that her asshole was exactly like a donkey's should be. Puckered out, it appeared to be nothing more than a black donut.
"Me? I'm not the one who screwed up. I told you not to touch anything didn't I?" Jeff chuckles as Liz's transformation continues. Her feet have turned into hooves, and a sharp crack sends her to the ground. Her legs change their stance to a digitigrade one, and it takes Liz a few tries to get back to her feet.
Her face then started to ache, and as Liz cried out in pain her muzzle formed. Her nostrils got huge, and a thick donkey tongue washed over them. Her teeth fell out, and were quickly replaced by sharp incisors, and flat molars in the back, both designed for grazing. Her hair fell out and in its stead, a short mane grew on her lengthening neck. Her ears flick back and forth as she stares at her body. Her breasts have moved down right above her crotch. They end in hard black nipples, and were full with milk.
Then, Liz felt another, unexpected, change in her rear, more specifically her pussy. It felt like someone was pulling her lips out of her body. She flung her ass back as the quivering continued. Jeff felt no shame in watching as Liz's cunt was transformed into a proper jenny pussy. The lips were thick and black. The insides slick with fluid, and releasing a musty scent into the air. It got him hard.
The lips pulled down, and formed a tear drop shape. They clenched and unclenched as the lust continued to fill Liz's body. She couldn't control herself. All Liz could think about was finding a stud to mount her. Her brain shrunk to the size of a donkey's.
The five minutes were up, and Liz was now a literal dumbass. Her body retained a human cast to it, but overall she was just another horny donkey. She still had her hands, which were currently dipped into her large pussy. Liz kept braying as her pleasure grew and grew. Jeff watched, stroking his own cock. Watching her lips clench and unclench like that, it was driving him crazy.