The step donkey

When the bar has reach the end on the screen appears a picture of Layla, next to her picture there's another one with a donkey and below them there's a text "Compatibility found. Paul the trigger to confirm."

Joel instantly pull again the trigger, the gun shots a laser ray in the direction of Layla, she's too stunned to react and she gets hit directly.

"What the fuck did you do st-" she stops to speak when a strange sensation begins to spread through her body, a tingling sensation start on her butt and when she turns to look at it she remains shocked by seeing her ass expanding, it becomes rounder and her hips gets wider stretching the fabric of her trousers.

She can't explain what's going on and things are getting worse when she can feel her boobs to grow too.

"What's happening?" Her voice is low, just above a whisper, the changes aren't over yet, and when she looks down at her feet she can see her finger are stretching and fusing in a way that seems impossible, also her legs are becoming long and more muscular.

"Thanks to my new invention you'll become what you ever meant to be!" Says Joel, his face is a mix of proudness and evil, Layla doesn't know how to react at his words but she has something else to be worried about, her feet are completely transformed, now are replaced by a pair of sturdy hooves making her to struggle to stand up, she can feel her ears changing, now they're longer and more pointed.

Her face is now longer with her nose closer to her mouth, her nostrils are wider, "help mheeee-haaaaw!" Of course she wasn't expecting that exiting from her mouth, but attention was immediately driven to another sound, the fabric of her trousers has reach it's limit and finally her incredibly big butt is finally free and a little tail is sprouting out above her ass.

"Don't worry sis... In few seconds you'll be finally free from all of your problems..." Joel is slowly approaching Layla, meanwhile her ears have reach their final stage by moving on the top of her head, all over her body a layer of grey fur is growing.

"Heeee-haaaw don't... I..." Layla can feel the changes are not affecting just her body, also her mind is becoming simpler, more animalistic, just like her thoughts in fact she can feel her intimate parts becoming more sensitive.

Joel close the door trapping Layla inside and avoiding her noises to be heard by his stepmother, "I'm so glad you're the first one to test my gun, I hope you like it!" Say Joel, but Layla can't understand what he's saying, her cunt has swollen and has started to produce a huge quantity of juices.

"Need... To be breed..." This is the only thing that matters for her now, in fact she position herself on the bed in the direction of Joel and spreads her legs to invite Hume, "... Pleasheee-haaaw!"

"With pleasure little sis..." Joel start to fuck his new step donkey, his thrust are strong and make Layla to moan every time he enters her, the last changes of the transformation take act, her face features adjust to her new form and her mind gets free by useless thoughts.

Her pussy is way bigger than before and accomodate Joel's cock with warmness, she's completely lost in the sensation, getting fucked so rough make her to reach the climax fast.

"CUM! NEED! INSIDHEEE-HAAAW!" And of course Joel satisfy her wish by filling her womb with her sticky semen, Joel's takes some step far to admire the work of his new gun: Layla is gone, a new creature is layed on his bed now.