https://www.hentai-foundry.com/pictures/user/Mophingu

.:1:.
As a doctor in zoology, Bella had spent years studying the behavior of various members of the bovid family of animals trying to learn what made them so intelligent. Living alone in the mountains on her small ranch allowed her to study peacefully without the interruption of others. She had observed various forms of what appeared to be communication between her horses and cattle, but no matter how hard she tried, she couldn't break the code to what they were saying. Eventually, Bella began developing a special serum that might give her further insight into their mental thought processes and mannerisms. She'd been testing it on herself in small doses, making sure it was fully safe, but so far its only effects were quick flashes of heat through her but no breakthroughs yet.

Eventually, Bella's patience got the best of her and with her most recent version of the serum, she decided it was time for a full dose. She felt confident she was on to something. What form that something would take, she was still unsure, but she was eager to find out. Having let all her animals out of the barn and into the pasture for the day, Bella walked into the barn hoping the environment would help stimulate her experiment. It was a cooler day and she dressed comfortably and light, hoping it would counter any warming effects as she knew the tiny doses tended to cause flashes of heat to flood through her. She looked down at the vial of glowing purple liquid and took a deep breath. She was shaking with excitement, but a bit nervous as well, even though it had previously proven to be safe in small doses with no after affects. With one last confidence building exhalation, Bella uncorked the vial, and downed the whole grape flavored serum in one go.

.:2:.
Just after Bella finished the serum, the familiar heat flooded through her. However, as this was a full dosage, the experience this time was much more intense than she expected. Instantly she started to sweat and every inch of her body felt like it was radiating an intense warmth. Bella decided to remove the small amount of clothing she was wearing to let the cool breeze bring down her body temperature as much as possible and sat down on some nearby bales of hay. Instead of dissipating, the warmth radiating from her body started turning to pleasure. It was as if the feeling of pleasuring herself was radiating from every inch of her.

Bella's heavy breathing echoed through the barn as her pussy lips became puffy, sensitive, and soon, dripping wet. The pleasure came in waves, with each wave getting more and more intense. It was almost as if her body was building toward and orgasm the likes of which she'd never experienced. Each wave brought about strange and subtle changes that she'd yet to experience from her previous tests either. Her breasts felt warm to the touch and oddly a bit heavier than she remembered and her nipples were enlarged and incredibly sensitive as well. With each new wave of pleasure, it felt as though her body was growing and changing and with each wave so did her pleasure increase as well. Bella let out a loud moan as the next wave rushed through her, savoring the subtle expansion and change of her body. Panting from pleasure and quivering with excitement, she couldn't wait for the next wave to begin.

.:3:.
The pleasures surging through Bella continued to build with each passing moment, each wave growing stronger than the last. Her experiment had gotten a bit out of control but, as good as it felt, it didn't really matter to her. She hadn't made a reversal serum to stop its progress, so she was already in this for the long haul. Standing up, Bella made her way across the stall before having to stop and hold on to some equipment running across the ceiling as another waved began to build.

Breathing heavily, Bella's legs quivered and shook from delight as she let out another moan. She felt as her breasts and thighs both swelled in size, the sensation was practically orgasmic, but she wasn't able to crest into climax. It was as if the changes from the serum were edging her in the most extreme way. She could also feel other changes on her body like an odd pressure around her tailbone and two on either side of her head as well as a tingling sensation in her ears. She was now practically oozing from between her legs, her mind, flooded with the thoughts of being pleasured. Bella couldn't wait for what was to come next as the feelings continued to grow.

.:4:.
Bella made her way back over to the bales of hay by the window, her legs barley able to hold her up. Another wave came, making her feet and legs stretch and grow. She stumbled, but caught herself on a bale, her legs quivering and shaking. Soon her chest and ass followed suit, growing even larger as well. Her breasts felt so heavy and full that the pressure in them was causing milk to leak and spray from her nipples, with each wave only making it more intense. Panting from the pleasures coursing though her, she could still feel the pressure pushing out from her tailbone and something now swaying around. The two bumps on Bella's head had turned to small horns and her ears continued to grow. How much more of this was left before the serum's changes where complete? Having never tested this much before, she had no clue, but if the pleasurable waves of transformation continued, Bella didn't want it to end any time soon.

.:5:. (On the way)

Pretty good for the first 5 pics, then she turns more animal than human which is a turn off. Finding the right balance is tough but here it ends up being too much. That type of transformation is also much hotter when there is a male human-bull hybrid to help the woman along with some good bovine bonking.

Base +6