That's Vat (Patreon)

The witch stared at the mess on her floor. Her apprentice, a lithe woman in her mid twenties, stood trembling with a broom in her hands. The woman had clumsily knocked over the cauldron in which the witch was brewing her latest concoction, and when the large pot hit the floor it cracked along the side. The liquid seeped out into the floor, fading to a muted shade of purple.

The witch thought for a moment, mulling over what just happened to her paraphernalia. She was calm, smirking only faintly behind her hand as a wicked idea crossed her mind. As her apprentice started to apologize, the witch held up her other hand. “Oh, no, don’t apologize! Accidents happen, my dear, and it’s just a cauldron. There can be… replacements,” she laughed. The apprentice sighed, still shaken after the accident. The witch sat her down on one of the velvet stools, telling her not to go anywhere, and that she had just thought of a solution to both of their problems.

“Just sit there, I’ll show you exactly what I mean,” the witch directed, heading towards her storage room for her selection of ingredients. She grabbed several things, knowing the right kind of potion she wanted to brew in her brand new cauldron. A variety of jars and bottles clattered in her hands as she made her way back to the central room. Her apprentice fidgeted in her seat as her mistress approached her with a wide smile.

“Wh-what kind of potion are you brewing, Mistress? A-and where are you brewing it?” the lady asked with such beguiling naivete. For a second, the witch regretted the formality of their relationship. It was the sweet innocence that her apprentice had that the witch found attractive, and she would do anything to keep her around.

The witch giggled, setting some of the bottles onto the work table. “Oh, you’ll see! I don’t want to ruin the surprise,” she turned quickly, trying to hide a blush that was spreading across her face. The apprentice tilted her head with a befuddled expression. Just as she opened her full lips to ask another question, the witch shoved the open end of one of the bottles between them. A strange fluid, one that tasted fermented and sweet, started pouring down the apprentice’s throat. The witch removed the bottle once all of the contents had been drained into the woman’s body. She methodically chose the next ingredient, pouring it into the other girl’s mouth.

She swallowed, not knowing what else to do with the flower petals falling into her mouth. The maiden could feel the mixture of ingredients in her stomach, reacting as more were stuffed into her. Her belly started to fill up, stretching out her dress. When reactions started to occur inside her, the fluids in her stomach began to fizz and bubble. Her stomach was rapidly swelling up as bubbles tickled her insides. Her hands darted to her sides, feeling the fizzing in her belly.

The witch continued adding ingredients to the concoction inside her apprentice’s stomach. She would take a break every few ingredients to shake the rounding figure, making sure to mix the brew well. The woman squirmed a bit as the potion inside her expanded and bubbled as it was stirred together.

The witch took a step back to allow the brew to settle, making sure it was blending properly. As the liquid stilled, the reactions became more noticeable under the maiden’s dress. The seams strained, popping a bit as her belly swelled beneath them. Her skin tickled as small bubbles filled most of her insides. The expansive effect gradually increased, quickly inflating the woman’s belly.

Satisfied with the reaction so far, the witch continued adding different ingredients into the woman’s figure. She hummed to herself, thinking about what to add next. Her firm hand tenderly shook the belly as she thought. The fizzling, sloshing sound from within intrigued the witch. The sound caused an internal reaction in the witch, making her feel even more lustful towards the expanding woman before her. She pressed a finger to her lips, pondering. As she got another idea, the witch poked a finger into her apprentice’s massive form.

“Now you be a good cauldron and stay put! I need to get something from the pantry. Don’t move too much, we can’t have that mixture going volatile,” the witch teased, patting the woman’s head. Once she went deep into the pantry, the woman trembled slightly.

The potion inside her expanded more, as if the very fluid were self-replicating. The seams along her side and front started to snap, the threads not strong enough to contain the absolutely massive curves of her belly. The very bottom of her belly grazed onto the cottage’s floor, sending tingles of pressure through her skin.

The witch returned to see the new size of the woman’s belly, and she couldn’t hide the excited surprise she felt. An impressed laugh burst from her lips, and she rushed towards her apprentice. She felt the size and pressure of the belly with her gentle hands. The witch stifled a sapphic moan, pulling herself away from the rounded figure.

Regaining composure, the witch added the rest of the ingredients she had fetched from the pantry. She jostled the orblike form, giving the potion a final good stir. The reaction inside the apprentice’s belly went into overdrive as everything came together. She squirmed, feeling the intense pressure as the brew settled inside of her. The remains of her dress fell to the floor in segmented ribbons, exposing her nude body. This imagery drove the witch mad, her lust for her apprentice strong.

The potion inside the woman finished its expansive work, settling down. She sighed, relieved that the growth was over. The witch looked over the results of her experiment, giving the maiden’s belly a gentle slap or grope where she saw fit. The witch nodded, pleased with the brew’s effect on the elasticity of the figure.

“Once this brew’s totally digested, you’ll be back to normal with no strange side effects,” the witch informed her beloved assistant. “At least, I think there’s none. You’ll have to let me know if there are.” Her assistant’s eyes widened, but she understood. There was always something strange going on with the mistress.

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