No, it’s easy for you, I thought. Tonight you will fondle my father while I am the plaything of a demon.

“Yes, Aunt.” I looked down at my hands.

She sighed, eyelids drooping in preparation for another tender moment. “If only dear Thisbe—”

“Aunt,” said Astraia, who was now standing beside the chest of drawers. “Aren’t you forgetting something?” Her hands were behind her back, her smile as big and bright as the time she had eaten all the blackberry tarts.

“No, child—”

“So isn’t it lucky I remembered?” With a flourish, she pulled out from behind her back a slim steel knife hanging in a black leather harness.

For an instant, Aunt Telomache stared at the knife as if it were a big, fat spider. I felt as if I had swallowed that spider, as if it were crawling down my gullet with poisonous legs. That was how lying felt: all the lies I had swallowed and spat out again, vile and empty as the husks of dead insects, all for the sake of making sure that precious Astraia could stay happy. And this knife was the most important lie in our family.

“I had it specially made,” Astraia went on earnestly. “It’s never cut a living thing. Just to be safe, it’s never been used at all, not even tested. Olmer swore it wasn’t, and you know he never lies.”

Unlike the rest of us, who had been telling her for the last four years that there was a chance I could kill the Gentle Lord and walk away.

“You do realize,” Aunt Telomache said gently, “that it’s possible Nyx won’t get a chance to use the knife? And”—she paused delicately—”we can’t be sure it will work.”

Astraia raised her chin. “The Rhyme is true, I know it. And even if it isn’t, why shouldn’t Nyx try? I don’t see how stabbing the Gentle Lord could possibly hurt.”

It would show him that I was not broken and cowed, that I had come as a saboteur to destroy him. It would likely make him kill or imprison me, and then I would never have a chance to carry out Father’s actual plan. Even if the Rhyme were true—even if—trying to fulfill it was still a bad bet, when the Resurgandi might never have another chance like me again.

“I don’t know why you’re so reluctant to trust Nyx,” Astraia added in an undertone. “Isn’t she your dearest sister’s daughter?”

Of course she didn’t understand. She’d never had to think through this plan, weighing every risk because she had only one life to lose. She’d never woken up in the night, choking on a dream of a shadow-husband who tore her to pieces, and thought, It doesn’t matter how he hurts me. I’m the only chance to save us from the demons.

Aunt Telomache met my eyes, and the flat set of her mouth spoke as clearly as words: Indulge her for now, but you know what to do.

Then she pulled Astraia close and dropped a kiss on her forehead. “Oh, child, you’re an example to us all.”

Astraia wriggled happily—she was almost a cat, she liked so much to be petted—then pulled free and gave me the knife, smiling as if the Gentle Lord were already defeated. As if nothing were wrong. And for her nothing ever would be wrong. Just for me.

“Thank you,” I murmured. I could feel the rage pushing at me like a swell of cold water, and I didn’t dare meet her eyes as I took the knife and harness. I tried to remember the panic that burned through me last night, when I thought her heart was broken.

She was comforted in minutes. Do you think she’ll mourn you any longer after your wedding?

“Here, I’ll help!” She dropped to her knees and strapped the knife to my thigh. “I’m sure you can do it. I know you can. Maybe you’ll be back by teatime!” She beamed up at me.

I had to smile back. It felt like I was baring my teeth, but she didn’t seem to notice. Of course not. For eight years I’d borne this fate, and in all that time she’d never noticed how terrified I was.

For eight years you lied to her with every breath, and now you hate her because she’s deceived?

“I’ll give you a moment to yourselves,” said Aunt Telomache. “The procession is ready. Don’t dawdle.”

The door clicked shut behind her, and in the silence that followed, from outside I heard the faint patter of drums and wail of flutes: the wedding procession.

Astraia’s mouth trembled, but she pushed it up into a smile. “It seems so recently we were children dreaming of our weddings.”

“Yes,” I said. I had never dreamt of weddings. Father told me my destiny when I was nine.

“And we read that book, the one with all the fairy tales, and argued about which prince was best.”

“Yes,” I whispered. That much was true, anyway. I wondered if my face still looked kind.

“And then not too long after Father told us about you”—well, he told her, when she turned thirteen and wouldn’t stop trying to matchmake me—“and I cried for days but then Aunt Telomache told us about the Sibyl’s Rhyme.”

Every half-educated child knew about the Sibyl’s Rhyme. In the ancient days, Apollo would sometimes touch a woman with his power, granting her wisdom and driving her mad at once, and she would live in his sacred grotto and prophesy on his behalf. They said that on the day of the Sundering, the sibyl stood up and proclaimed a single verse, then threw herself into the holy fire and died; she was the last sibyl, and that day was the last time the gods ever spoke to us.

Every well-educated child knew that it was just a legend. There was no good evidence that there had been a sibyl in Arcadia at the time of the Sundering, let alone that she had said such a thing, and no ancient lore about demons, nor any newly discovered Hermetic principle, so much as hinted that what the Rhyme prescribed could work.

The day that Aunt Telomache told Astraia the Rhyme, she forbade me ever to tell her that it wasn’t true. “The poor child’s had enough of tears,” she’d said. “As you love her, let her believe it.”

I had promised and I had kept my promise, and so now I got to watch Astraia clasp her hands and recite it in a low, reverent voice:

“A virgin knife in a virgin’s hand

Can kill the beast that rules the land.”

A hopeful half smile twisted at her lips, and she darted hopeful half glances at my face. It was my cue to smile and pretend to be comforted, as if the Rhyme were true. As if Astraia weren’t asking for comfort as much as trying to give it. As if I had ever lived in her world, where daughters were loved and protected, and the gods offered an escape from every terrible fate.