Mary picked up the vial with a picture of a bull on it. She had always had a kinky set of fetishes, and the idea of changing was just something that she could not pass up. She was still a little nervous about taking the vial, but that fear was lost in the growing sensation that was building up in her. She didn't want to drink the whole vial in case something went wrong and couldn't change back. So to make sure that nothing went wrong she decided to only drink about half of the vial. So Mary took the box with the rest of vials with her and the Bull vial and walked out into her backyard and put them on the table on her back deck. She lived hundreds of feet off the main road, and had almost no neighbors around her. She also knew that she was going to have complete privacy, because of all the trees that surrounded her house. Mary was defiantly glad she had decided to move out into the countryside.
She took the Bull vial and drank half of it. As soon as she had put the cork back on the top, it instantly refilled. Mary was amazed, but didn’t want to take away from the change that was about to occur. She walked down off of her deck and into her yard. She stood here, nervous but excited at the same time, waiting for the change to take over her. She sat there for a few moments, waiting for something to occur. After a few more minutes, she started to become aggravated. "Oh what the hell. I can't believe these things were fake. I should have known these things were no goo-oooooooooo-ood." Mary's eyes opened wide and she instantly covered her mouth. Did she just moo? Her shock instantly dissolved into excitement when she realized the vials were finally starting to take their effect.
Mary suddenly felt a tingle in her ears. It felt as if someone was pulling hard on her ears She reached up to see what was happening to them, and when she touched them, she found they had changed completely. They were now elongated outward, and they were covered in a small amount of fur. Mary tugged on them a little, making sure that they were real, and the little jolt of pain proved they were. A tight pinch shocked her right above her ass. She turned back and saw he pants were being pushed outward slightly, and there was a growing bulge that snaked down her pants. She quickly took them off, leaving her panties on, and saw a long tail covered with black fur and a red tuff on the end. She flicked the tail with her new muscles, and the strange sensation was too much for her. Mary was getting more and more excited with the changes, and reached down to start rubbing herself. As she was rubbing her clit, she started to feel a change in her crotch. She looked down and noticed that there was something growing from her. A long penis grew out from her, extending out, with two balls dropping below it. Mary blushed as she touched it, moaning as it throbbed, straining against her panties.
She grabbed it and started stroking the shaft slowly. With each stroke the changes becoming more and more sensual, changing her more and more. The next thing Mary felt was a sudden tightness in her clothes. Her panties were starting to become too tight for her. It felt like her ass was expanding way too rapidly, and soon the seems strained, and with a loud ripping sound, split into two. Mary looked back, and was a little upset over the loss of her favorite panties, but more turned on by the changes to her body. All over her body was expanding, becoming more powerful and muscular, with her shirt and bra being burst into shreds. Her face started to feel funny, almost like it was pushing out. Her nose flared out, and extended until she had a half muzzle, with her teeth and tongue changed to fit that of a Bull. Horns grew out from the top of her head, but Mary was too involved with the pleasure of her cock to notice the pain. Mary’s feet and hands also began to change, feeling them change, hardening up into hoof-like fingers for hands, and her feet turned completely into hooves, bursting out of her shoes.
Her chest shrunk down as well, her once perky C-cup down to about an A. She didn’t care, she had her growing dick to play with. It kept growing, inch after inch, until she had a cock of almost 2 feet. She mooed in pleasure. Her voice had become deeper to match her changes. She felt so strong and sexy, as her sexual thoughts had kept changing. Her thoughts changed to those of cow girls, and bending them over so she could put her long cock deep into their pussy. She wanted to hear them moan and moo with Mary, as she fucked them with her enormous dick. Mary moaned and mooed, knowing that she was close. “Oooo-oooooo-ooooh, Mooo-oooooo-ooore, Mooooo-oooooooooooooooooooooo,” was all she could say before she came, spewing what felt like gallons of cum. She panted in pleasure, shocked and turned on about what she had just done. Her long tongue hung out of her mouth as she panted. She was a sexy, powerful beast, and she wondered what to do next.