Elizabeth picked up the potion set and took it with her into the bathroom. Opening the case, she looked at each of the bottles with a sense of pure glee. She had always wanted to experience a real magical transformation firsthand, and now her wish was being granted. The big question for her was, which bottle to choose?
"Hmm...," she said to herself, pondering the question. "Pig?" She thought about it, and rejected the idea quickly. She wasn't quite sold on the prospect of potentially gaining a bunch of extra weight yet. "Sheep?" Again, she decided against it-- it was a warm summer day, and having all that extra wool seemed like it might be uncomfortable. "Or... what about Horse? Or Monkey?" There was no question, she was going to have to try all of them eventually-- but at the moment, none of them seemed to stand out. None of them, that is, except for...
"Snake!" she said, finally making a decision. It was very clear to her-- the thought of becoming part-snake was the one that had her the most excited. She held up the bottle for a closer look. The liquid inside was a minty green color, and looked a bit like mouthwash. Setting it aside on the sink for the moment, she began to strip off her clothing: first her shoes and socks, then her shirt, then her skirt, and finally her bra and panties. She piled them together on the counter beside the sink, and stood there, looking at her naked body in the mirror. Next she removed the measuring cup from the box, and carefully began to pour the contents of the snake bottle into it. "Okay... let's see. Well... I don't think I want to turn completely into a snake just yet. I guess I'll try half the bottle. If I like what I become, then I can have a little more." She looked at the liquid in the cup, trying to gather up the will to commit to her decision. Reaching over into the box again, she pulled out the human bottle. "I think I'd better have this ready, just in case I need to reverse it quickly." Still holding the human potion in her left hand, she downed the snake potion in one gulp. Just as it looked, it had a mild, pleasant cooling mint taste. Elizabeth licked her lips, and gasped as she saw her reflection in the mirror.
Her tongue was already forked, just from coming in contact with the potion. Opening her mouth wide, she realized her teeth had changed dramatically, becoming sharp and hook-shaped, with her upper canines changed into a pair of prominent fangs. "Whoa! That wasss fasssst!" she hissed. For a brief moment, as she stared into her own eyes and watched the pupils become slitted, she was overtaken by a feeling of terror, beginning to feel remorse for what she had just done. But the fear quickly faded away, as a warm sense of euphoria began to course through her veins. All over her body, she watched in stunned fascination as her skin thickened and the upper layer became covered in reptilian scales. Her neck lengthened about an inch, and her breasts lost their mammalian nipples-- though she still retained the overall physique of a female human.
Then, suddenly, there was a dizzying sensation that forced her to sit down on the edge of the tub. When she looked down, she found her legs fusing together. She felt her libido steadily growing, turned on by the changes that were occurring. Unconsciously, she started to stroke her vagina, even as it reformed into a cloaca. But before she was done pleasuring herself, she heard the sound of glass breaking, and realized she could no longer feel her cloaca being stroked. When she opened her eyes, she understood what had happened, and once again the dread was back:
She no longer had any arms. Looking down, she could see that she had dropped the bottle of human potion into the tub, and that it had shattered and spilled its contents down the drain. "Uh-oh," she said, understanding the gravity of the situation. "That'sss probably going to be a problem..."
Elizabeth rose up from where she was sitting and examined herself in the mirror. Her transformation appeared to be stopping, finally-- but it left her looking VERY different. She still had some hair on her head, but aside from that, her body was now hairless. Her scales were black, with a pattern of white bands every three to four inches. Her face was flattened into a distinctly serpentine snout, and her ears had flattened as well. Her torso was thin and still very much human-shaped, but with no arms and a giant snake tail instead of legs, she resembled a naga-- a sexy naga.
"Well...," she said, gazing at her own reflection with a smile, "at leassst I sssstill look good."