AN: From interactive "Transfiguration", chapter originally written by Mr. George.
As Harry looked at the expanded body of his girlfriend, and back to her own body, she realised quite how exaggerated she'd allowed it to become. A blush coloured her cheeks, as she looked somewhat shamefaced back to Ginny. He'd imagined paying any price to lose that scar, that identified him to every casual observer. But taking in the abundant swell of her chest, she reconsidered that price.
She smirked at the idea of taking care of this long hair. His former boyish mop, already proving beyond his ability. Those full glossy lips looked fit for only one purpose, and her boyish memories filled in every detail, as she found herself imagining them straining around a warm, firm cock. The smirk shifted up a gear, as she admired the size and erectness of her new nipples. Nips that were already erect from the presence of Ginny, or perhaps just the chill air of the girls bathroom.
Looking back to Ginny, she saw a wicked twinkle in Ginny's eye.
Librum Corpus.
As she pronounced the spell she tapped Harry's sternum with her yew wand sending a tickle like bubbles racing across her skin. Harry didn't recognise the spell, but knew she wouldn't enjoy it.
"Just think of it as an early Christmas present." Ginny told her. "A body like that is made to be enjoyed. Though you now have the time to find the downside, or be overwhelmed by it's drives... it's needs... it's instincts."
Playfully, she tapped Harry on her petite nose, "Don't worry, I've ensured you'll turn back on the last day of the holidays."
As Harry looked in horror at 'the present' that Ginnny had gifted her. It all sank in, and she felt a cold dread of explaining all this to Hermione, and Ron.
Ginny's games weren't finished, though. Harry's mind was still racing, unsure how normal this was, even in the wizarding world.
Ginny waved her wand in front of her own chest.
"Now, you have an important decision to make, do you want to be a lesbian, or do you still need cock..."
Just the sound of Ginny saying 'cock' made Harry flinch nervously. Then her eyes shot wide, as she worked out what Ginny was offering. The meaningful look at her own crotch, and Ginny's curious open expression were impossible read her preference. She wasn't sure how long she'd been distracted, how long since she'd heard Ginny's question.