Summary: Narcissa and Sirius make an Unbreakable Vow when they're about to go to Hogwarts that if they're not married by the time they're twenty five, they'll marry each other.
Author's Note: Yup, it's a Sirius Black/Narcissa Black fic. If you don't like it, don't read it, and if it inspires you, please let me know the name of the fic, because I love me some Narcissa Sirius Blackcest!
Another Author's Note: I'm using artistic license to get Narcissa and Sirius to be the same age.
Yet Another Author's Note: By the way, some of the chapters in this fic are ridiculously short—like the next one. I really don't particularly care if you don't like them that short, because this fic is more like a stream of memories than an actual story. There are just five moments in time that make up this story, so if you don't like the length of the next chapter, tough, I'm the author, not you, and if you want to do better, be my guest!
Disclaimer: I am not J.K. Rowling and do not own anything that belongs to her, nor do I claim to. I do own the plot, though. The idea is mine, all mine. *Hugs idea and cackles evilly*
CHAPTER 1—The Vow
"Siri," Narcissa Black called to her cousin, who had just arrived with his younger brother, Regulus.
Sirius Black hurried over to her. "Hi, Cissa," he said, and then playfully ducked under his mother's arm to disappear into the living room.
"Siri!" Narcissa ran after her cousin, ducking under her aunt's arm around the other side, leaving Walburga Black to blink at her sister in astonishment at their twin bad parenting skills.
Narcissa caught up to her cousin and tackled him, slamming him into the couch. "Oof! Cissa…" he complained.
Narcissa eased up slightly and Sirius twisted around, pinning her into the same position she had just held him in.
Bellatrix walked in just then, and grumbled something about her 'immature sister and cousin'.
"What's that, Bella?" Sirius asked.
"I said, you little idiot, that you and Narcissa are going to be good for each other. You know, when you can't find anyone else…" she added sarcastically.
"Trix, I'm not going to be with him," Narcissa said.
"Yeah, I'd never—" Sirius began, but Narcissa slapped him. "Hey—" he started again.
"Whatever. No one would marry either one of you, anyway," Bellatrix said evilly as she started towards the door.
"Of course someone would marry me!" Narcissa complained at her sister's back.
"Suuuure, you can think that, honey," Bellatrix cooed.
"Here, Narcissa," Sirius said after a brief pause. "How about this? When we turn twenty-five, if we're not married, we have to marry each other, as long as the other is not married either, within…a year?"
Narcissa blinked at her cousin. "Okay," she said, "but we have to do this thing called an Unbreakable Vow. I heard Bella talking about them."
"Okay," Sirius said.
"Do you, Sirius Black, promise to marry Narcissa Black when you turn twenty-five, if you're not married, as long as she is not married either, within a year?"
"I do," Sirius said with great solemnity. "And do you, Narcissa Black, promise to marry Sirius Black when you turn twenty-five, if you're not married, as long as she is not married either, within a year?"
"I do," Narcissa grinned.
"What did you do?" Bellatrix gasped, having heard the exchange.
"We said we'd get married if we weren't married by the time we were twenty-five," Sirius said.
"I know that, you idiot!" Bellatrix hissed. "That is an Unbreakable Vow! Don't you get it? It's unbreakable! You'll die if for some reason you don't get married! What if you're betrothed, Narcissa? What if you are in some legal matter or another and you are in no circumstance to marry my sister, Sirius? Oh, good god! You two are such idiots!"
Sirius and Narcissa both looked at their feet, disliking Bellatrix's reprimanding tone.
"If we're lucky—and god knows I hope we are—then you two managed to do it wrong. If not, then we'll just have to plan for this circumstance and make sure Narcissa gets married before this even turns into an issue. Sirius, your birthday is later, and your wording should have made it not an issue if Narcissa is married, but we'll need to make sure you get married right away as well. I won't tell Mother and Aunt, because I know that they both feel horrible having managed to raise you like they did, and I don't even want to think how they'd feel if they learned you two managed to get yourselves into the problem that you did."
"Cissy, Trixie, Sirius," Andromeda called from the next room. "You have to come eat now."
"Coming, 'Dromeda," Sirius called.
"Yeah, Andi," Narcissa said, "we're coming!"
And they all went to sit down and eat, with three of them hiding a secret that would determine the direction of their lives.