See first chapter for disclaimers and warnings.

RECAP: Harry and Hyacinth have just learned that their parents are allowing them to attend Hogwarts after their dragel inheritance has come through. They are excited about this new revelation and can't wait for things to get interesting.

Dinner was a delightful affair.

Sirius and Remus were present, without their respective other halves and Peter and Lisa shared indulgent smiles at the twins' excited reactions. Lily and James had smiled fondly at their children, listening to their excited chatter before finally speaking up to get a word in edgewise.

"Now, now, that's enough, both of you. I know—we know," James corrected hastily at a pointed eyebrow from Lily's corner. "That you've wanted to attend a real school and as we both went to Hogwarts, it seemed only fair and fitting that we allow you that same chance." He took a deep breath. "Things have changed quite a bit since we've been there,"

"I'll say," Sirius chuckled. "Cassie will be excited," he said, referring to his daughter, Cassiopeia Black, who tended to take more after her mother, Rosemerta.

"What about Jimmy?" Harry asked, remembering the Pettigrew's oldest child. Jimmy Pettigrew was a year older than the rest of them and as such, his first year had just finished. "Uncle Peter?"

"He'll be happy to have you two attending too." Peter smiled, warmly. "Thanks for asking after him, Harry. He's done alright. He won't be the next Merlin, but he will be a good wizard." He hesitated, thinking of his other two children. They hadn't shown the slightest inclinations of magic as Jimmy had. "The others are a bit disappointed, but-"

"But nothing of the sort," Remus said, firmly. "They're not true squibs, so they still have magical potential. Their birthdays are just next week, a Hogwarts letter could still be in the works."

"You're a dear, Remus." Lisa said, softly. "Thank you." She was grateful for this lovely family she'd married into. Peter, shy and timid to a fault, was a sweetheart to her and he'd lost his arm, but not his courage on that fateful night in Godric's Hollow, when he'd tried to protect his friends, the Potters. They'd repaid them by offering the honor of godmother to Lisa. She'd tearfully accepted.

The werewolf smiled at her, a hint of fang visible, as it was closer to the full moon, but his eyes were not the full amber of the wolf. "As for you two rascals," he said to the twins. "I was asked to deliver these by Dumbledore himself," he withdrew two thick, cream envelopes with the red wax Hogwarts seal along the front. "Congratulations."

The twins whooped with joy and snatched each other's letters, trading them back and forth to see that they were properly addressed and to whom, understanding the magical quill that saw to all Hogwarts correspondence.

"We're going to Hogwarts, Harry!" Hyacinth exclaimed. She slid out of her seat and began to dance a little jig right there.

Harry burst into laughter, before he was tugged up to join her and they performed and impromptu little show for their mismatched family without complaint. "This will be the best year ever!" Harry said, emerald eyes sparkling.

"You said it, Twin." Hyacinth hugged him.

Harry smiled into her messy black hair and hugged her back, twice as hard. This would definitely be a year of change for them all.

When their sixteenth birthday rolled around, Harry found himself crippled with painful cramps all over and a terrible headache. He'd had to take his glasses off, as they seemed to be making his vision worse and resolved not to eat so much cake the following year. After some deliberation, he'd ventured over to Hyacinth's room, knowing the door would be unlocked—to him, anyway—as it always was between them.

He crept into her room, doubling over from the painful spasms in time to see her sprawled on the bedroom floor in her bathing costume. "Cinthy?" He croaked.

Her head turned faintly and her lips twisted into a grimace. "Hurts, Har." She managed, struggling to get her arms to work to move her to the bathroom.

"Elf?" Harry tried. He'd tried to call one, but nothing had happened.

"Wrong magic." Hyacinth said. "Can't summon." She gritted her teeth. "Bathroom. Tub."

Together, they managed to stumble into her private bath and to the large, sunken marble tub at the far end. For once, Harry was glad for his twin's taste in dark colors, because he didn't think his eyes could handle the brightness of white. The black marble was tolerable though and the moment she touched the smooth surface, Hyacinth had it filling with lavender oils and frothy white suds.

"Cold." She gasped out to Harry, before tumbling herself into the water.

He followed her a second later and understood the warning a moment too late. Cold was an understatement. The water was freezing! "Hyacinth Marie-!" He growled, unable to say more as his teeth began to chatter.

"Better—for pain." Hyacinth closed her eyes, tipping her head to rest back on the ledge of the giant pool-like tub. Her fingers grasped for the slippery edge, anything to hold onto as another spasm wracked her body. "They didn't say it'd be like this." She choked out.

"No—talking." Harry chattered. He stretched a hand to her and their fingers tangled awkwardly, a jolt of shared pain passing between them. A moment later, he moaned and she groaned.

And then they were both screaming, begging and pleading as bones and organs shifted inside, bodies adjusted to a primal heritage making itself known and magic rewrote its decree from the inside out.

Harry howled to the ceiling, hearing Hyacinth's unearthly screech in his ear as the white, foamy water around them began to turn a strangely pinkish hue. He was vaguely aware of a tremendous pain ripping outward from his back, just between his shoulders. Soap stung his eyes and he scrabbled at his arms, shrieking in confused pain when it seemed like even his own touch was painful.

He heard Hyacinth's cries mingling with his own and then the tub was draining and warmer water was trickling in and everything just hurt and he was so, so tired! He felt Hyacinth collapse half on top of him, her bodyweight so slight, but her very physical touch nearly unbearable in his raw state. She whimpered and he couldn't stop the urge to crush her tight to him, nuzzling into her wet, sudsy hair.

A soft, desperate sound bubbled out of her throat and Harry registered a piercing pain along the side of his neck, just as something warm and heavenly dribbled past his lips. He forgot his armful of twin-sister in favor of seizing the thing offering him that delightful taste. He pressed it to his lips, greedily sucking, relishing in the coppery tang that slid down his throat without the faintest hint of disgust.

And here's the second chapter. This fic will not have anywhere near as much detail as my usual fics. LOL. It's intended to be light and fun and Harry and Hyacinth are just really close siblings. There is NO incest of any sort. Thanks for reading!