The Vance house was large, handsome, and quiet in the particular way of houses where the people who live in them are very busy and very careful with each other.

Scarlett and Chloe had grown up in it side by side and somehow always slightly apart - two daughters of a demanding name, raised to excellence by parents who measured affection in achievements and were, more often than not, somewhere else. They loved each other. That was never in question, underneath everything; it was simply that loving each other had been crowded out, over the years, by the sheer effort of being what they each were - Scarlett the eldest, the responsible one, the one who carried things; Chloe the prodigy, the strange one, the one who disappeared into her work - until the love had become a thing they both assumed and neither said, a quiet given they walked past every day without stopping.

They did not, as a rule, talk about anything that mattered. They coordinated. They passed in the hall. They had, between them, the polished frictionless distance of two people who knew each other completely and confided in each other not at all.

Which was why neither of them saw it coming.

It was a Saturday. Rain again, soft this time, pattering at the windows of the kitchen where Scarlett sat with three folders of Council work and a pot of tea, doing the thing she did with weekends, which was to fill them. Chloe drifted in for food - she'd been up in her room with her instruments since dawn, as usual - and made herself toast, and the two of them existed in the same room with the easy unspeaking parallelism of long habit, Scarlett working, Chloe eating, the rain at the glass.

It might have stayed that way. It nearly did.

What broke it was nothing - a phone, Chloe's, buzzing on the counter with some notification, and Chloe glancing at it, and her face doing a thing. A small involuntary thing, a softening, a flicker of warmth she was much too unpracticed at hiding to actually hide, there and gone in an instant.

Scarlett, who read faces for a living, who had spent a lifetime watching her difficult unreadable sister and learning to interpret the tiny tells most people missed, looked up at exactly the wrong moment and caught it.

She didn't think much of it, at first. "Good news?" she asked, mildly, not really looking up from her folder.

"It's nothing," Chloe said, and put the phone face-down with a haste that was, to a trained observer, extremely interesting. "It's - a person. From school. It's not - nothing."

The over-correction snagged Scarlett's attention the way a dropped stitch snags a thread. She set down her pen. "A person from school," she repeated.

"A student," Chloe said, with the doomed escalating precision of someone making it worse. "A new student. He - they - it's not relevant. Why are you looking at me like that. I'm eating toast."

He.

Something cold and specific moved through Scarlett's chest.

It was almost certainly nothing. The school had a number of new students. The probability that her sister's small uncharacteristic softening over a phone notification had anything to do with the particular new student who had been occupying entirely too much of Scarlett's own carefully-policed attention for two weeks was - low. It was low. There was no reason to think it. She thought it anyway, the way you think the worst thing the instant the worst thing becomes possible, and she heard herself say, with a casualness that cost her enormous effort:

"Which new student?"

And Chloe, who was a genius, and who could not read a room to save her life, and who had been holding a secret too large for her all week with no one to tell and a desperate unexamined wish to say his name out loud to someone, made the catastrophic error of answering honestly.

"Leo," she said. "Leo Evans. He's - " and there it was again, the softening, undisguised now, her voice gone unconsciously gentle around the syllables " - he's not like the others. He listens. He gave me his umbrella in the rain and got soaked and didn't even - he doesn't want anything, he just - "

She stopped.

She stopped because her sister had gone completely, unnaturally still.

Chloe, for all that she couldn't read a room, could read Scarlett - they were the same that way, each fluent in the other's tells while strangers to everyone else's - and what she read now, in the absolute stillness of Scarlett's hands and the careful blankness that had dropped over Scarlett's face like a shutter, was not the mild big-sisterly interest of a moment ago. It was something braced. Something that had been struck and was holding very still so as not to show it.

The kitchen was very quiet. The rain ticked at the glass.

"You know him," Chloe said slowly, and it wasn't a question, because she could see the answer, could see it in the high color that had risen on her composed sister's face, in the pen Scarlett had set down too carefully, in a dozen small tells that suddenly, horribly, arranged themselves into a pattern. "You - Scarlett. You know Leo."

"He sits next to me," Scarlett said. Her voice was perfectly level. The levelness was itself the giveaway; Scarlett was only ever this level when she was holding something down hard. "In registration. We've had - he's been to the Council office. For orientation. It's a Council responsibility, integrating new -"

"You've had lunch with him." Chloe's eyes had gone wide behind her glasses. "The - everyone said - I didn't - the President never has lunch with anyone, everyone said it was strange, I didn't connect - that was him? You've been having lunch with him?"

"For orientation purposes," Scarlett said, and the sentence came out brittle.

"You kept his pen."

Scarlett's head came up sharply.

"I saw it," Chloe said, the data assembling itself now with the terrible momentum of a proof reaching its conclusion, all the small filed-away anomalies of the past two weeks resolving at once. "On your desk. A red pen, you've had it out for - you never leave things out, you file everything, and there's been a pen just sitting there and a second lunchbox in the dish rack and you've been - " Her voice caught. "You like him. You. You like him too."

The word too landed in the middle of the kitchen and detonated quietly, and there was no taking it back, because it admitted everything from both sides in a single syllable - too, as in also, as in I do and so do you - and the two Vance sisters sat across the kitchen table from each other in the grey rainy light and looked at the thing that had appeared between them, the thing neither of them had ever imagined could appear, and did not know what to do.

For a long moment neither spoke.

Scarlett recovered first, because Scarlett always recovered first - it was her function, her terrible competence, the reflex to seize the controls of any situation spinning out of order. But the controls didn't quite respond this time. "This is - " she started, and stopped, and started again, and what came out was lower and rawer than she intended. "Chloe. This is not - it isn't a competition. It's a misunderstanding. We've both - it's clearly just that he's new, and unusual, and we've both been - it's an infatuation. It will pass. These things pass. We're not going to let some boy -"

"It's not passing for me," Chloe said quietly.

It was the quiet that did it - the flat undefended honesty of it, from the sister who never said undefended things - and Scarlett felt the careful management she'd been reaching for slip out of her hands entirely.

"It's not passing," Chloe said again, looking down at her cold toast, her voice very small and very certain. "I measured it. I - that's not a joke, I actually measured it, I've been trying to make it stop for a week and it doesn't stop, it's not an infatuation, it's not going to pass, I checked." She looked up, and her eyes were bright and wet behind the glasses. "And you kept his pen."

And Scarlett, faced with her sister's naked admission, found she could not retreat into the lie any longer either, not in the face of that, not when Chloe had just laid her own heart on the kitchen table between them with nothing covering it.

"...I kept his pen," Scarlett admitted, and it cost her, the words dragged out of a place she never let anyone into. "I don't - I don't know why. I couldn't put it back. I've never not been able to put something back." She pressed her hands flat on the folder in front of her, an old gesture, steadying herself on her work the way she always had. "He caught me. When I fell. Nobody's ever - " She stopped, jaw tight. "It doesn't matter. The point is that this is impossible. You see that it's impossible."

"Why is it impossible?"

"Because you're my sister!" The words came out with more force than Scarlett had meant, cracking the level surface at last, and underneath them was a whole life of something neither of them had ever named. "Because I'm supposed to - I've spent my entire life looking out for you, making sure you were alright, carrying the things so you didn't have to, and I cannot - I will not be in a position where the thing I want and the thing you want are the same thing and one of us has to - " She broke off, breathing hard, appalled at herself.

And Chloe, who had spent her own entire life on the other side of that sentence, said the thing she had never once said in sixteen years.

"I never asked you to carry things for me."

Scarlett went still again.

"You just - did it," Chloe went on, the words coming faster now, things long sealed finally breaking loose. "You always just did it, and everyone always said how wonderful you were, how responsible, how you looked after your strange little sister, and I was supposed to be grateful, and I was, I am, but you never - you decided. You decided you'd carry everything and I'd be the one who got carried, and you never asked if I wanted - I'm not a thing you carry, Scarlett. I'm a person. I have - apparently I have a heart rate, it turns out, I have - " Her voice broke entirely. "He's the first person who ever talked to me like I was a person and not a - a brain you keep in the family, and you want to take that away because you got there first and you're the responsible one and you're always, always the one who -"

"I am not trying to take anything away from you!" Scarlett's voice rose to meet hers, and for a moment they were both there, two sisters shouting in a kitchen, years of unspoken things finally spoken all wrong and all at once. "You think I want this? You think I asked to - I have spent my whole life making sure you were alright and now the one time something is mine, the one time there's something I -" She stopped, horrified, her hand flying halfway to her mouth.

The one time something is mine.

It hung there, the truest and most terrible thing either of them had said, and they both heard it, and they both went silent, breathing hard across the table, the rain ticking at the glass, the tea gone cold between them.

And then - because they were sisters, because under all of it the love was still the one true given they'd walked past every day - the fight ran out of them as fast as it had risen, and left behind it only the two of them, sitting in the wreckage, frightened of the same thing.

"...I don't want to lose you over a boy," Scarlett said, finally, very quietly. "That would be - that's the actual unacceptable outcome. Not him. You."

"I don't want to lose you either," Chloe whispered.

They sat with that.

"So we don't," Scarlett said, slowly, reaching - as she always reached, in the end - for a structure, a rule, a way to make the unbearable manageable. "Whatever - whatever this is. We don't let it do that. We're sisters first. Before him. Before anything." She swallowed. "I'm not - I won't pretend I don't feel what I feel. I can't, apparently, I've tried. But I won't fight you in the dark over it. No - no sabotage. No going behind. If we're both in this then we're both in it honestly, and the one thing we don't do, the line we don't cross, is each other. Agreed?"

Chloe looked at her sister - really looked, in a way she wasn't sure she ever had - and saw, perhaps for the first time, not the perfect competent Scarlett who carried everything and made her feel small, but a girl as frightened and as caught as she was, holding out the only thing she knew how to offer, which was a rule to keep them both safe.

"Agreed," she said.

They didn't hug. They weren't that kind of sisters, not yet, maybe not for a long time. But Scarlett reached across the cold tea and the scattered folders and put her hand, briefly, over Chloe's - an awkward, unpracticed, enormous gesture from a girl who carried things and never reached for them - and Chloe turned her hand over and held it, and for a moment the distance of years closed to nothing at all.

Then Scarlett withdrew, and squared her folders, and Chloe picked up her cold toast, and the two of them sat in the rainy kitchen having declared, in the same breath, both a war and a truce - rivals now, for the first time in their lives, over the same impossible boy, and bound more tightly than ever by the promise not to let it break them.

Neither of them said the other obvious thing, the thing that hung unspoken over the whole strange treaty: that they had no idea, yet, that they weren't the only two. That out beyond the rainy windows of the Vance house, a runner and an heiress-to-be were circling the same sun, and that the careful private truce two sisters had just sworn across a kitchen table was about to meet a war far larger than either of them had imagined.

But that was still to come. For now there was only the rain, and the cold tea, and two sisters who had found, in the wreckage of the strangest conversation of their lives, something they'd lost so long ago they'd forgotten it was missing: each other.

It was, Chloe thought, looking at her sister across the table, a reductive but not inaccurate characterization of a good outcome.

She didn't say it out loud. But she almost smiled.