It came at seven the next morning.
Jane was in the kitchen when she heard Dimitri's voice from the study — not words, just tone, and the tone was different from any she'd heard from him. Sharp. Controlled, but underneath the control something tight and hot.
She waited. Ten minutes later he appeared in the kitchen doorway and he was wearing the expression she'd seen on the map morning — focused, cold, all the recent warmth sealed away behind purpose.
"What's happened?" she asked.
"Anton." He picked up the coffee she'd already made and drank it without sitting. "The London situation has escalated. The men we identified — it's not just a rival faction. Someone inside my organisation has been feeding them information." He looked at the table. "Someone I trusted."
Jane heard the weight of that last sentence. "Who?"
"Not confirmed yet." His jaw was very tight. "But Anton has narrowed it to three people."
"Is Anton on that list?" she asked.
He looked up. "No."
"Are you certain?"
"Yes."
"How certain?"
"Jane." His voice was very level. "Anton is the only person I would trust with my life. He is the only person who has never given me a reason to doubt him."
She nodded. "All right. What about Natasha?"
A silence. Not a comfortable one.
"Natasha is family," he said.
Jane chose her words with care. "I know," she said. "I'm not saying she did it. I'm asking whether she's on the list of three."
He looked at his coffee. Then at the window. Then at Jane, and she saw in his face the particular exhausted grief of someone being asked to consider the betrayal of someone they love.
"She's on the list," he said.
Jane nodded slowly. She thought about her conversation with Natasha in the library. About sharp smiles and the word calculus. About the way Natasha had watched Dimitri at dinner with eyes that were very warm and very unreadable.
"Tell me everything Anton told you," she said. "All of it. I want to think this through with you."
He looked at her. "You don't have to be involved in this."
"You involved me," she said, without bitterness. "The moment you noticed me at that gala, I was involved. So let me actually be useful."
He sat down. He told her everything.
And Jane listened, and thought, and began, slowly and carefully, to see the shape of the thing.