This is one of my favourite types of stories - an AU Twins WrongChildrenWhoLived!Fic. The next two chapters will be up in the next few minutes, so stick around if you would. Link to the pictures on my profile! Enjoy...

KSoup.

Preface

"James, why don't we have the Prewetts over for dinner tonight, for Halloween?" Lily Potter asked her husband one evening. "We've been meaning to ask them for weeks."

"That's a great idea, love," James agreed, putting no feeling into the endearment. "Jayden and Justus can finally have a play date with Demi and Sierra."

"I'll go floo Gideon and ask him," said Lily.

Dinner at the Potters' was uneventful that night. Gideon, Krystal, Lily, and James talked and laughed and discussed the war while the two sets of twins played on the floor. At seven thirty exactly, James stood.

"I've just remembered," he lied, "I promised Bathilda I'd bring her those candied apples for Halloween…"

"Oh, well you should then," said Lily caringly. "She gets so lonely sometimes…"

"I'll go with you," offered Krystal, playing her part well.

It was about a thirty minute walk to the home of Bathilda Bagshot on the other side of Godric's Hallow; the perfect cover for the adulterous couple.

Lily and Gideon knew nothing of their partners' activities, as they both loved and trusted them, and they suspected nothing as the two left.

There was a knock at the door. Lily rose to open it.

"Oh, hello Sirius, hello Fabian!" she cried happily, hugging the black-haired man and red-haired man in turn.

"Hello Lily, Gideon," Sirius Black responded, smiling, with a nod to the red-haired man on the couch. Fabian crossed behind Lily and went to sit next to his brother.

"What brings you to the Hallow?" asked Lily as they stepped back inside.

"I couldn't let a holiday go by without seeing my favourite godsons!" he said, beaming as he walked over to where the children were playing; Demi and Justus were busily stacking some wooden blocks, forming what looked like a castle, while Jayden and Sierra were pressing buttons on an obnoxious noisemaker. Sirius would never admit it out loud, but he preferred Justus over Jayden, in fact he thought of Demi as more of a niece than he thought of Jayden as a nephew. Simply put, Jayden and Sierra were brats.

"Unca Pafoo!" cried Justus, standing shakily on his feet and hugging his godfather's legs. Demi was right behind them; those two were inseparable. Jayden and Sierra didn't even seem to notice him.

They visited in peace for about a half hour; Sirius read The Tales of Beetle the Bard to Demi and Justus, and Jayden and Sierra each had a tantrum when Lily and Gideon wouldn't allow them a piece of candy.

Just as they had put the four children to bed – the adults wanted to visit late, and decided it would be better not to wake them up in the night – there was a flash from outside.

"What could that – " started Lily, but she was interrupted by a loud BANG from downstairs.

The four adults rushed to the staircase and saw, to their horror, none other than Lord Voldemort.

"Well, if it isn't Lily Potter, Sirius Back, and Gideon and Fabian Prewett," he sneered.

They immediately drew their wands, but he waved them down with a cold chuckle.

"Do not flatter yourselves…I am not here for you, but for the children."

"The children?" barked Sirius, not lowering his wand. "What in the bloody hell would you want with children?"

"That is none of your concern, Black." Voldemort said menacingly, stepping toward the staircase slowly.

"No!" cried Lily suddenly, raising her wand even further and glaring at the snake-faced being. "You will not touch them!"

Voldemort chuckled coldly again. "Stand aside, silly girl. The children must die, but you needn't. Don't be foolish."

"You want to kill them?" yelled Fabian in outrage. "Kill four babies? Is that what you've sunk to? Murdering helpless children?"

Voldemort chuckled once more. "Helpless now, perhaps, but they won't be for long…which is why I need to deal with them now."

"No! I will fight you until the end, you will not have them!" cried Lily furiously.

"As will I!" enforced her Sirius, coming to stand beside the redhead and raising his as well. "You will not touch my godsons!"

"And you won't have my daughters either!" thundered Gideon.

And the battle raged.

It didn't take long for the Dark Lord to get rid of all four Order members; he wasn't sure who he had killed and who was stunned, but it mattered not. All that was important now was getting rid of those brats…

There were two cribs in the room: one done in black, the other in red. In one crib stood a boy and girl, the girl with auburn hair, the boy with dark brown. The other babies were both light-brown haired.

The Dark Lord frowned, ignoring the fact that the two lighter-shaded babies were crying pitifully, and the other two were simply glaring at him and shaking in anger and fear. He knew the Prophecy spoke of two children, yet there were four who fit the criteria of said prophecy…

He mentally shrugged. Why not kill them all and make a clean job of it?

He raised his wand, trained it on the crying twins first. They were much more annoying, anyway. Voldemort repeated in his mind the curse he had invented just for this task….

"Avada Kaduos!"

A bright flash of green light…then green mixed with white…pain…screaming…children were crying…there was a snap, and the roof caved in right over Demi and Justus's crib, trapping the babies inside it.

Then there was silence.

The two whimpered in fear in the quiet following. Well, mostly quiet, as Sierra and Jayden were screaming their lungs out.

When James and Krystal finally made it back, they found their favourite children crying in their cribs, the house collapsed around them, bodies everywhere. Sierra and Jayden now had scars on their right cheeks: Sierra's a heart, Jayden's a sun, and – when they woke Sirius, the only adult survivor – he said that Voldemort had attacked them.

Dumbledore was called, and the old man was convinced that Jayden and Sierra had vanquished the Dark Lord. Sirius, luckily, remembered that the other two babies existed, and when he extracted them from their crib, everyone was shocked.

Justus and Demi both had scars as well: pressed into their left palms like a brand was a lightning bolt symbol. Sirius insisted that this needed checking out; what if it hadn't been Jayden and Sierra who destroyed Voldemort, but their twins?

Dumbledore, however, insisted that they must have been injured by the after effects of the spell, or by the roof caving in. No one would hear another word about Demi and Justus, and they all joined the Order at Hogwarts for a celebration feast.

Except Sirius. He stayed with the two forgotten children. It wasn't hard for him to figure out, though Dumbledore might ignore it: Demi and Justus had saved their siblings, empowered by their mother and father's sacrifice, and had been touched by Dark magic, thus the lightning-bolt scars. Sierra and Jayden had been protected by the Light magic of their twins, thus the heart and sun scars.

When their godfather laid them down that night (in a guest bedroom, since theirs was destroyed) Justus and Demi had a sense of what had happened. They knew that they would never see Demi's father or Jayden's mother again. However, they could never know just how bad the next few years were going to be…