Lyra stood at the end of the hallway, her back still cool from the fire escape's metal rail. The others had gone ahead—Nova and the new Nova, Rina, even the new Lyra—their voices trailing down the stairwell like the last notes of a song she couldn't quite catch. She'd lingered, one hand on the doorframe, watching the way the dim light pooled on the worn carpet. Still cool from the night's air. She'd wanted a moment alone, a breath that didn't belong to anyone else.

Now she wished she hadn't.

The gasp came through the wall like something breaking. Sharp. Alien. Not a sound of surprise or startlement—those had texture, warmth, the shape of a human response. This was different. This was a sound Lyra had never heard from Sera, and it stopped her cold with her hand hovering near the bathroom door handle, slick with condensation.

She didn't move. Didn't breathe.

The apartment held its silence the way a held breath waits for the next one. The damp towels on the rack brushed the wall with each faint draft from the bedroom, their fabric whispering against the paint. Somewhere below, a car door slammed. A laugh, distant and human, rose and fell.

Lyra's abdomen pulsed.

That hollow ache—she knew it. She'd felt it on the rooftop, standing over Nova's sprawled body, watching pleasure crack the air between them. She'd felt it again moments later, when the second Lyra had blinked at her with the same violet eyes, the same silver-blonde hair, the same bewildered smile. The ache was a door closing somewhere inside her, a piece of herself walking out and never coming back.

It pulsed now, uninvited, answering a call she hadn't made.

She pressed her palm flat against her stomach, feeling the warmth beneath the thin fabric of her dress. The earth-toned cotton was soft, worn from too many washes, and it clung to her skin where the night's humidity had settled. Her fingers splayed wide, as if she could hold the ache in place. As if she could keep whatever was happening on the other side of that wall from happening at all.

But she already knew. Some part of her had known the moment the gasp cut through.

She'd felt it in her own body—that same cellular itch, that same splitting sensation that had torn her apart on the rooftop and left two of her standing in the aftermath. The feeling was unmistakable now, a signature she'd learned to read in her own flesh. The gasp hadn't been fear. It hadn't been pain.

It had been the sound of someone coming undone.

Lyra's hand drifted from her stomach to the bathroom door handle. The metal was cool, slick with condensation from the shower Rina had taken before dinner—the shower that had run long, longer than any of them had noticed, because they'd been too busy laughing over tacos and watching the new Lyra discover the miracle of hot sauce. Rina had excused herself early, claiming exhaustion, her earbuds already dangling from one hand.

Sera had followed minutes later, murmuring something about needing to check the library's schedule for tomorrow.

Lyra hadn't thought anything of it. She'd been too busy pretending she didn't feel the new Lyra watching her, too busy pretending she didn't notice the way the new Nova's touch lingered on her arm, familiar and possessive in a way that made her chest ache with something she couldn't name.

Now she understood. Now the pieces clicked together with a sound like a lock turning.

The gasp hadn't been Sera's alone. It had been both of them—two voices braided into one, rising and breaking against each other. Lyra had heard that sound before, had made it herself on the rooftop, her mouth open against Nova's throat as the world split apart.

She knew what she would find if she opened the bathroom door.

She didn't open it.

She stood there, frozen, her hand on the handle, her breath held in her chest like a bird trapped behind ribs. The condensation beaded on her fingers, cold and wet, and she watched a single drop slide down the metal and fall to the carpet, where it disappeared into the worn fibers without a sound.

The silence stretched. Broke. Stretched again.

From behind the bathroom door, a whisper. Two whispers, actually, layered over each other like overlapping harmonies. Lyra couldn't make out the words, but she didn't need to. She knew the shape of them. She knew the tremor that ran through a voice when it had just been unmade and remade.

Her abdomen pulsed again, harder this time, and she pressed her palm against it, feeling the ache radiate outward through her hips, her thighs, the base of her spine. The itch was there too, that cellular restlessness, that sense of something waiting to be torn loose. She'd thought she could control it. She'd thought she could keep it coiled and contained, a secret she carried alone.

But Sera hadn't known. Sera had no idea what she was capable of, what she'd just done in the steam of that bathroom.

And now there were two of her.

Lyra's fingers tightened on the handle. The metal creaked faintly under the pressure, and she forced herself to let go, stepping back as if the door had burned her. The damp towels brushed her shoulder as she retreated, their fabric cold and heavy against her skin. She could smell the shampoo Rina used—something floral and synthetic, a human invention that had delighted her for weeks—and beneath it, something else. Something muskier. Something that made Lyra's stomach tighten with recognition.

She knew that smell. She'd worn it on her own skin, in the aftermath of her own undoing.

The bathroom door opened.

Lyra's breath caught.

Sera stood in the doorway, her cardigan gone, her round glasses askew on her nose, her silver-blonde hair loose and damp and clinging to her cheeks. Her face was flushed, a deep pink that spread from her cheekbones down her neck and disappeared into the collar of her shirt—the soft, worn shirt she'd worn to the library, the one with the faint stain on the sleeve she'd never been able to wash out. Her hands trembled at her sides, fingers curling and uncurling as if she'd never seen them before.

And beside her, another Sera.

The second Sera was identical in every way—the same gentle curve of her shoulders, the same thoughtful tilt of her head, the same soft, deliberate way she held herself. Her glasses were slightly different, Lyra noticed, a tiny scratch on the left lens that the original's didn't have. Her hair was tucked behind the same ear. Her cardigan—she had one too, somehow, the same worn green wool, the same loose thread at the cuff.

They stared at their own hands, both of them, as if the answers to every question they'd ever asked were written in the lines of their palms.

Lyra couldn't move. Couldn't speak. The hallway had become a different place, the dim light pooling differently, the worn carpet shifting beneath her feet. She was standing at the end of a corridor that led to a door she'd opened before, and she knew exactly what was on the other side, and she knew she could never close it again.

"What did we just do?"

The whisper came from the new Sera—or maybe the original, Lyra couldn't tell, and maybe it didn't matter. The voice was Sera's, soft and careful, the voice that asked deep questions about humanity's capacity for love and loss. But it was different now. Thinner. Shaken in a way Lyra had never heard from her.

"What did we just do?" the other Sera echoed, and the two voices braided together, rising and falling against each other, and Lyra felt the sound in her chest like a second heartbeat.

She opened her mouth. Closed it. The words wouldn't come—they were stuck somewhere in her throat, tangled with the secret she'd been carrying since the rooftop, the secret that had grown heavier with every step down the stairwell, every taco eaten, every laugh shared. The secret that was now standing in the hallway in front of her, wearing Sera's face, trembling with Sera's hands.

"I—" Lyra started, and then stopped. Her voice sounded wrong, distant, like it belonged to someone else.

The two Seras looked at her, their violet eyes identical, their expressions a mirror of confusion and fear and something else—something that looked almost like wonder. The new Sera reached out, her hand hovering in the air between them, and Lyra saw her own reflection in the other woman's glasses, small and pale and hollow-eyed.

"Lyra," the new Sera said, and her voice cracked on the name. "What's happening to us?"

The hollow ache in Lyra's abdomen pulsed, a deep, rhythmic throb that matched the beat of her heart. She could feel it spreading, that cellular itch, that sense of something shifting beneath her skin. She'd felt it before, twice now, and she knew what it meant. She knew what it cost.

But she couldn't say it. She couldn't tell them the truth—that she'd done this, that her power had somehow infected them, that every moment of pleasure in this apartment was a seed that could split and grow and multiply until there was no telling who was original and who was copy. She couldn't tell them that the family they'd built was built on sand, that every sister they gained was a piece of someone else lost.

She couldn't tell them that she was the reason they were all here, and that she didn't know how to stop it.

The bathroom door opened again.

Lyra's head snapped toward the sound, and she saw Rina step out into the hallway, naked and wide-eyed, her short spiky hair still wet from the shower. Water beaded on her shoulders, catching the dim light, and she was clutching her earbuds in one hand, the cord dangling between her fingers like a lifeline. Her chest rose and fell with quick, shallow breaths, and her violet eyes were fixed on something Lyra couldn't see.

Behind her, another Rina peeked over her shoulder.

The second Rina was identical—the same petite frame, the same colorful crop top that she'd somehow put on in the chaos, the same earbuds dangling from one hand. She was drier than the first, her hair only slightly damp, and she was staring at the original Rina with an expression of pure, uncomprehending shock.

"Did we—" the new Rina started, and then stopped. Her voice was Rina's, bright and energetic, but it was thin now, stretched to breaking. "Did we just—"

She couldn't finish the sentence. Neither could Lyra.

The hallway was full of them now—Lyra and the two Seras and the two Rinas, all of them standing in the dim light, all of them staring at each other as if the world had tilted sideways and spilled them out. The damp towels brushed the wall. The condensation on the bathroom door handle gleamed. Somewhere in the apartment, a pipe groaned.

And Lyra felt the secret in her chest grow heavier, pressing down on her lungs, making it hard to breathe.

She'd thought she could keep it contained. She'd thought she could carry it alone, a burden she'd chosen, a weight she'd earned through her own pleasure, her own weakness. But now it was spreading. Now it was taking root in the people she loved, splitting them apart, multiplying them into versions of themselves that had never asked to exist.

And she didn't know how to stop it.

The new Sera took a step forward, her hand still hovering in the air, and Lyra saw the question forming in her violet eyes—the same question the new Lyra had asked on the rooftop, the same question Sera had asked at dinner, her voice soft and careful: "What are you hiding?"

Lyra opened her mouth to answer.

And the hallway held its breath, waiting, as the secret she'd carried alone grew heavier still, and the bedroom door behind the Seras swung open, revealing more surprises yet unseen.