Ginny Weasley licked her lips and grinned slightly as she looked down at the potion, carefully adding another ingredient, giving it another stir before using her wand to adjust the temperature of the flame beneath the cauldron. "Ok, I think it's just about ready," she said, glancing up at Hermione. The pair had been working on this potion carefully for a week now in secret, it was supposed to make them more beautiful, irresistible to whomever they might desire. Well, that was the description in the old book they had found anyway. Neither of them expected it to be quite so powerful but they were sure it would have at least some minor effects on their looks, enough to maybe boost their confidences a little bit. Besides, they had noticed lately that several of the girls had mysteriously gone up a cup size or two, so it was certain that other students were giving themselves little 'boosts', but this potion would be more of a full package than a simple breast enlargement.
"Okay...easy does it," Ginny produced two ladles, handing one to Hermione, then carefully using the other to begin pouring out the potion into several small vials. The potion was only supposed to be temporary so would need to be taken regularly to maintain the effects. Fortunately only a small amount was needed, so it would be easy to fill multiple vials and carry them around without them being noticed. Even better, consuming multiple vials would amplify the effects if taken in quick succession. Eventually Ginny had taken her half of the potion, filling up multiple vials, each now carefully corked except for one, the one she intended to take right away.
"Well then...bottoms up?" Ginny held up her vial towards Hermione for a moment, before bringing it to her lips and downing it with a single gulp. "It doesn't actually taste too bad," she licked at her lips, then shivered slightly. "Oooh, feel kind of tingly...and pretty warm...phew." She fanned herself, then shivered again and suddenly let out a moan. "Ooooh!" Ginny suddenly arched her back a little, pushing out her chest and looking down. Before their eyes Ginny's bust was slowly expanding, her bra growing tighter, her blouse pulling more tightly around her chest, until a button suddenly popped off, followed by another, Ginny's breasts swelling two cup sizes before they seemed to settle.
"A-ah....oh god...I need...to get a stretchable bra or something...h-heh.." Ginny smirked, then yelped as she suddenly felt a tightness elsewhere as well.
"H-huh? What the hell?" Ginny looked down as she felt a tightness in her panties. The girl scrambled to her feet, lifting up her skirt, allowing both girls to watch as her panties bulged and stretched, Ginny whimpering, before the panties could take no more, a loud ripping noise filling the room as the front of her panties burst open, an erect cock being revealed, long and thick....and still growing.<|im_end|>
Hermione smiled as Ginny finished the potions. Seeing the other girls going around with 'boosts' to their chests, made something inside her click. She was supposed to be with Ron, but her true crush was right in front of her. Knowing that she could do nothing about it, in the way she wanted to, she added two secret ingredients to her vial that she was supposed to take right now. Adding Mandrake root and a little bit of seaweed from the lake, she smiled as she heard Ginny say "bottoms up," and she drank it down before Ginny could stop her. Smirking, she felt the same, her body heating as she felt her breasts begin to grow. It wasn't enjoyable, but it didn't hurt either. Then came the growth of her cock. Just as large as Ginny's, but hers a bit more intense, as it would be with her forever now. Sure she'd still have her pussy as well, but she wanted this as well. As their cocks stopped growing, and the ripping off panties and buttons popping on blouses, Hermione reached down to her hard throbbing cock. Putting her hands on it, she shivered.
"Ah...it's more sensitive than I'd thought," she commented, running her hands along the length of her shaft, feeling the veins and the heat coming from it. She continued to run her hands along it, the feeling too good to stop. "Ah...ahh...it's so intense! I can't....I can't stop!" Hermione said as her hands kept moving as if on autopilot. Seeing the tip of her cock start to drip precum, her eyes rolled slightly. She felt the release building, but she couldn't get herself over the edge by herself. "G...Ginny! Help me! Do something!" she said, looking at her friend with a small smirk on her face. This was the beginning of the end for Ginny, for as soon as she was able, Hermione would claim what she'd always wanted since First year: Ginny.<|im_end|>