The Billionaire’s Secret Daughter (The Sterling Hearts #2)

Chapter 1 Chapter 1

The coffee was wrong.

Not wrong in any catastrophic sense — not burnt, not cold, not made with the wrong beans — but wrong in the specific way that things were wrong when they had been made by someone who understood your preferences perfectly and had executed them flawlessly, and you were standing in the kitchen of the most beautiful house you'd ever slept in, holding a cup of something that tasted exactly like what you'd asked for, and you still couldn't shake the feeling that you were waiting for the other shoe to drop.

Anya Pemberton stood at the kitchen island of the Notting Hill townhouse in bare feet, her hands wrapped around the mug, and watched the morning come in through the east-facing windows.

November light. Thin and silver and entirely noncommittal, the way London light was in the month before the city gave up and went properly dark.

It touched the marble countertop and the copper pendant lamp and the small ceramic pot of thyme on the windowsill — Felix had planted it in September, very seriously, with a small trowel and gardening gloves three sizes too large — and it made everything look like the establishing shot of a film about people whose lives were about to get complicated.

She was twenty-five years old. She was engaged to a man with a nine-figure net worth.

She had been living in his house for four months, and the children she looked after — Petra, age eight, relentlessly logical; Felix, age five, relentlessly everything else — were asleep upstairs, and the house was doing that thing it did in the early mornings, that particular held-breath quality, and Anya was standing in the kitchen she had learned to navigate in the dark, and she could not stop waiting for something to go wrong.

This, she knew, was a her problem.

The engagement ring was on her left hand.

A round solitaire in a low-profile setting — not the diamond cathedral of a ring she would have expected from someone who owned a baroque opera house in Bavaria for an entire season.

She had told him, early and clearly, that she didn't want something that would catch on things.

He had come back three days later with this: modest in size, precise in quality, a ring that looked like it belonged on a woman's hand rather than on a display shelf.

She had put it on and felt it settle like a fact.

The problem was not the ring.

The problem was that Anya Pemberton had spent twenty-five years being the sort of person who quietly prepared for things to be taken away.

The bakery. Her degree. The various futures she had sketched in pencil, easily erasable, because she had learned early that sketching in ink was asking for something.

And now she was here, in this life that felt like someone else's good fortune, and the part of her brain that had been raised on pragmatism and the specific anxiety of watching her mother balance a household budget on a tightrope — that part kept whispering, but what are you going to do when it ends?

She took a sip of coffee. It was, objectively, excellent.

"You have the look," said a voice behind her.

She turned. Cassian Sterling was standing in the kitchen doorway in dark navy trousers and a white shirt that hadn't been fully buttoned yet, his feet bare, his hair doing what it did when he hadn't yet persuaded it into its usual discipline — which was to say, doing what it wanted.

He was forty years old and annoyingly good-looking and he was watching her with that quality of attention she had spent months learning not to be self-conscious about, the same quality he brought to everything: total, measured, as though she were a variable he was still running calculations on.

"What look?" she asked.

"The one where you're troubleshooting something that doesn't exist yet.

" He crossed to the coffee machine with the ease of a man moving through familiar territory, though she knew that four months ago he had barely used this kitchen.

He had staffed it, not inhabited it. The distinction mattered. "What time did Petra wake you?"

"Five-forty. She wanted to know whether quantum entanglement could theoretically be used to communicate between parallel universes." She paused. "I told her I'd have to get back to her."

Cassian pressed the button for his espresso and turned to look at her. The corner of his mouth lifted — not quite a smile, but the thing that lived in the same postcode. "That's my fault."

"I know it's your fault. I'm going to need you to stop explaining the multiverse to an eight-year-old at bedtime."

"She asked."

"She always asks. That doesn't mean you have to answer at that level of detail."

The espresso machine produced its small, decisive sound. He retrieved the cup, turned, leaned back against the counter with his ankles crossed, and looked at her the way he did when he thought she was avoiding something. "How long have you been down here?"

"An hour, maybe."

"Anya."

"I know."

He said nothing. This was something she had needed time to learn about him — that his silences were not indifference, not withdrawal, but a specific form of patience.

He was waiting, not absent. In the first weeks she'd known him, she'd read the silence as coldness and had adjusted herself accordingly, pulling back, filling the air with pleasantries.

Now she knew better. Now she understood that when Cassian Sterling went quiet, he was giving her room.

She looked down at her coffee. "I keep thinking something's going to break."

"Something specific?"

"No. That's the thing. It's not specific. It's just—" She gestured, vaguely, at the kitchen, at the ring, at the whole improbable geometry of her life. "This."

He was quiet for a moment. Then he set down his espresso cup and came around the island to her, and she watched him do it — unhurried, deliberate — and he took her mug from her hands and set it on the marble and then he simply held both her hands in his, turning the ring slightly with his thumb, a gesture that had no purpose except to be a gesture.

"My company did not go under overnight," he said, and his voice was low and practical and not quite warm, because warmth was not a register he'd grown up speaking, but it was honest, and she had learned to hear honest. "My family did not become uncomplicated.

The thing with the tabloids did not become less stupid.

And yet." He looked up from her hands to her face. "Here."

"Here," she agreed.

"You are not a variable I'm running a risk assessment on," he said. "I know it looks like I run risk assessments on everything."

"You do run risk assessments on everything."

"I know. But not on this." He released one of her hands and picked up her coffee and handed it back to her, and the gesture was so perfectly Cassian — practical, capable, unromantic in the most romantic possible way — that she felt something in her chest unlock by a single increment.

"Drink your coffee, Anya. The thing that's going to break will break in its own time. We don't need to borrow it."

This was, she thought, what she loved about him.

Not the house or the ring or the improbable luxury of his life, though she had learned to receive those things without guilt, or was learning to.

It was this: his particular way of being reasonable in the exact moment she needed reason more than comfort.

She drank her coffee.

He drank his espresso.

Outside, the November light decided to make an effort, and for a few minutes the kitchen was genuinely warm.

* * *

Petra came downstairs at six-forty-seven, fully dressed, shoes already on, with a small notepad in which she had apparently been drafting further questions about quantum entanglement.

Felix came down eight minutes later in his school uniform with the collar folded inside out and one shoe buckled and one unbuckled, and with the air of someone who had made a series of decisive choices and stood behind all of them.

Anya fixed the collar. Felix endured this with remarkable patience for a five-year-old, then went to investigate whether there were crumpets.

There were crumpets. There were always crumpets now; Anya had learned this about Felix in approximately the third week and had thereafter maintained a standing order.

Cassian sat at the kitchen table with his phone, scrolling through whatever it was he scrolled through at six in the morning — market reports, she assumed, or emails from people in time zones where the day had long since started — and he did this with the practised efficiency of a man who had learned to segment his attention into small, clean blocks.

But she had noticed, over the months, that the blocks had shifted.

That the phone went face-down more often now, and that he sat at the table for breakfast instead of standing at his desk, and that once or twice she had caught him watching the children with an expression that he didn't seem aware he was wearing.

"Cassian," Petra said, without looking up from her notepad.

"Petra," Cassian said, without looking up from his phone.

"If you had a quantum computer with sufficient qubit stability, could you in theory solve the halting problem?"

A brief silence. Cassian set his phone face-down.

"The halting problem," he said carefully, "is provably unsolvable by any computational method. Quantum or classical. It's not a hardware problem, it's a logical impossibility, like asking whether a statement can simultaneously be true and false."

Petra considered this. "But if you could access all possible states simultaneously—"

"The undecidability isn't about access to states. It's about the structure of self-referential logic. Turing proved it in 1936 without a quantum computer in sight."

"Turing also worked on early computing machines," Petra said.

"He did."

"Did you know him?"

"He died in 1954. I am forty, not a hundred and forty."