She glanced upward, and for a splinter of a second, her mask slipped. He saw her love for those children, fierce and watchful. Then she looked back at him, and the door in her eyes was firmly shut.

"You will leave now," she said quietly. "Do not come again unless I permit it."

She climbed the stairs and did not look back. The maid showed him out, and the door closed with a click that echoed in his chest. The next morning, a letter arrived from his solicitor.

The twins, born during a marriage that had never been legally dissolved, for Rexam had not pursued a formal divorce, only a separation, were under English law the legitimate offspring of the Duke of Rexam. Henry Linton was, in truth, Henry Ashby, heir to the dukedom. Rexam lowered the letter and stared at the empty fireplace. He had a son.

He had a daughter. He had destroyed their mother's life, and they had existed for five years in a quiet Bloomsbury square while he dined with his mistress and complained of boredom. Somewhere in the house, a clock chimed the hour. He barely heard it.

He was listening to the silence of all the years he had lost and the faint, distant sound of a boy's laugh from a park he could not forget.

Part Three

Lady Anoria Devo did not take the news gracefully. Rexam called on her the following afternoon in her drawing room hung with crimson silk that had always struck him as vaguely cloying. He informed her, with the cold courtesy he reserved for difficult business, that their association must end. He offered no dramatic declaration, no apology.

He simply stated the fact and rose to leave. She laughed, a brittle sound. "You are jesting because of that drab creature you saw in the park. Everyone knows what she is. You cast her off yourself."

"My wife," he said, the word foreign and heavy on his tongue, "has given birth to my children. I intend to repair what I have broken, if she will allow it."

Anoria's face underwent a slow transformation, disbelief, then a flash of something ugly. "Your wife. You cannot even say her name without looking ill. You will crawl back to her, and she will make a fool of you before all of London. And when you tire of playing penitent, do not imagine I shall be waiting."

He left her standing amid her crimson cushions, her fury a palpable heat at his back. By evening, the story had rippled through drawing rooms and clubs. The Duke had a secret heir, a hidden family, a wife living in exile. The ton stirred with hungry interest.

Rexam ignored the gossip and returned to Bloomsbury three days later, this time with his solicitor in tow. He had prepared a document acknowledging the children's legitimacy and offering Catherine a reinstatement of her position as duchess, with all the protections and privileges that entailed. He presented it with the same crisp efficiency he might have applied to a land transaction. Catherine received him in the small parlor, Mrs. Crane a silent chaperone by the window.

She read the paper without expression and set it aside. "You wish to claim them," she said.

"They are my heirs."

"They are children," she corrected, her voice soft but unyielding. "They are not a line in a ledger. Henry is afraid of thunderstorms. Margaret can name every flower in the garden. They have never known a father, and they will not be handed over like parcels because a solicitor has drawn up terms."

His jaw tightened. "I am not asking to take them from you. I am offering to give them, and you, what you are owed."

"What I am owed." She repeated the phrase as though tasting something bitter. "I was owed loyalty five years ago. I was owed a fair hearing. I was owed a husband who did not assume my guilt on the word of a maid who was later dismissed for theft, as I learned long after it mattered. You cannot pay that debt with a piece of parchment."

She stood, and he saw that her hands trembled slightly, though her face remained steady. The sight cut deeper than any accusation.

"If you wish to know your son and daughter," she said, "you will first clear my name publicly. You will tell the world that you were wrong, that I was faithful, and that you abandoned me on false evidence. When that is done, we may speak of introductions. Not before."

The demand was not delivered with fury. It was delivered as a statement of fact, as immovable as the stones of her hearth. She left the parlor without dismissing him, and Rexam understood that the dismissal was implied.

He gathered his papers and walked out into the gray London afternoon. His solicitor murmured something about legal options, but the Duke silenced him with a look. He could force the issue. He could drag her before the courts, wield his title and his wealth, and take the children by right.

He could win. And in winning, he would prove himself exactly the man she believed him to be.

That evening, he heard the second piece of news from a friend at White's. Mr. Adam Thorne, the vicar of a small parish near Hampstead, had been a frequent caller at the Bloomsbury house for the past year. He was a man of modest means but impeccable character, and he had asked Mrs. Catherine Linton to marry him.

Rexam set down his glass of claret with a hand that was not entirely steady. She could not remarry while still legally his wife, of course. But a man like Thorne might be patient. A man like Thorne might wait, might champion her cause, might become the father her children had never had.

The Duke of Rexam had never in his adult life experienced jealousy. He discovered now that it tasted of copper and burnt sugar, and it kept him awake until the gray light crept through his curtains.

Part Four

The musical evening at Lady Carstairs's townhouse was an event of the minor season, which meant the rooms were crowded with those who had not yet retired to their country estates. Rexam attended because he had learned that Catherine would be present, invited by an old school friend who had maintained a quiet allegiance through the years of scandal. He arrived late and stood near the back of the music room watching. Catherine sat in the third row, her gown a deep blue that made her skin glow like pearl.

Beside her, a fair-haired man in clerical black bent his head to speak in her ear, and she smiled, a small, private smile that Rexam had not seen directed at anyone since the early days of their marriage. The vicar, then. Adam Thorne had a pleasant, unremarkable face and the comfortable build of a man who enjoyed his meals. He was everything Rexam was not, warm, approachable, utterly without artifice, and he was looking at Catherine with undisguised devotion.

The soprano launched into a Handel aria. Rexam did not hear a note. During the interval, he made his way through the crowd. Conversations faltered as he passed.

Fans fluttered, eyebrows rose. He had not spoken publicly about Catherine, but the rumors had done their work. The ton knew he had been seen outside the Bloomsbury house. They knew he had dismissed his mistress.

He stopped before Catherine's chair. Mr. Thorne stiffened, but Catherine rose with unhurried composure.