He laughed, making me feel foolish. ‘So you have been counting too.’

And suddenly I cast off any thoughts of the difference in our status. We were no longer royal duke and loyal dependent, simply a man and a woman encountering a choice that was no choice, and never could be.

‘My answer is no different now,’ I said.

‘Nor is my desire to have you with me. Are we at stale-mate? I wanted you then. I want you now.’ His words were low and urgent, forcing me to listen and consider rather than wilfully reject. ‘I cannot accept that you are indifferent to me. I can feel the blood raging through my body as I hold you, just as I can feel the beat of yours throbbing in your wrists.’

How horribly true. How could I deny what he could sense through the simple fact of our proximity? My throat was dry, my heart furiously beating against my ribs, as his heart did too with increased vehemence against my palms. I would be a fool to claim indifference when my cheeks were flushed with sudden warmth and my whole body trembled.

‘If I kissed you now, this very moment,’ the Duke surmised, eyes as keen as one of his goshawks in the mews, ‘I wager your lips would be warm and welcoming.’

So did I. I knew they would. Close enough that I could see my own reflection in his eyes, it was impossible to hide the turbulence of my thoughts. Helplessly, I turned my face away.

‘If I kissed you, how could you deny the attraction that draws us together?’ Lifting our joined hands, he turned my face to his. ‘Do you fear me? I don’t think you do—and I’ll not kiss you without your permission.’ And with a smile that hacked at the base of all my convictions: ‘Will you be my love, Katherine?’

But I was not so lost to good sense. ‘I can’t!’ Why could he not see? ‘It was wrong then and it is wrong now.’

‘That’s what you said last time.’

‘And I say it again. You should not ask it of me.’

Formality had fallen away from both of us. His eyes moved over my face, as if absorbing every feature. At first their hard brightness had returned, full of what I could only interpret as displeasure that I refused him. But then they softened, perhaps with regret. ‘It is not my intention to distress you.’ It had the sound of a benediction as his grip loosened a little. And then, when I had thought he might actually accept my denial of him and leave me, his gaze sharpened as it flicked over my person.

‘Why are you not wearing my rosary?’ So he had noticed the simple length of wooden beads at my waist, replacing the coral.

‘Because it is an unsuitable gift from you to your wife’s damsel.’

‘Unsuitable? What is unsuitable for the Duke of Lancaster to do?’ Arrested, he lifted his chin. ‘I thought it most suitable. I thought you would like it, and would find more use for it than a hanap.’

‘I do. Of course I do. It is magnificent.’ I felt an urge to shake him, as a woman might shake any obtuse man who could not follow her line of reasoning. ‘To give me such a gift—a gift of such portent—and then ask me to become your mistress, when I am part of your new wife’s establishment…it is too much.’

His brows, previously amused or lightly assured, drew into a flat line. ‘A sin, in effect.’

‘Yes.’ My mouth was dry, my heart as cold as stone, but it must be said. ‘It is immoral,’ I whispered. ‘It goes against all I learned as a child, in my upbringing at your mother’s hand. And in your careful raising too, I imagine.’

Nostrils flaring, the royal blood had never been so obvious. ‘If a man had said that to me, I would have cleaved his head with my sword. So you accuse me of immorality, Lady de Swynford?’

‘Yes. No…’ I had, hadn’t I? I felt my face flush again as I stumbled over my muddled response.

‘Well, that’s clear enough.’

‘It’s not clear at all!’ His fingers tightened around the soft wrappings as I tried to pull away again. ‘It weights on my conscience.’

‘So you reject me because of conscience.’

‘Yes. But not only that.’ I determined to explain. ‘I would never become the mistress of a man who did not respect me, or whom I could not respect to the same degree.’ So I asked him. A question I had never asked any man, certainly not a question I could ever envisage presenting to the Duke of Lancaster. ‘Can you respect a woman who agreed to give herself, in carnal sin, into a relationship with a man without the blessing of the Church?’

There was no hesitation: ‘Yes, I can, if you are that woman. Since I have made my desire for you more than plain, how can you ask it? I am the man who will cherish you, with or without the Church’s blessing, and I will stand protection for you against the accusatory world.’

A fine promise that touched my emotions. So he might be that man, but was I the woman to give myself over to that sin? Could I live a life founded on lust, on unholy, unsanctified, physical desire, which would call ignominy down on my head? It would take a strong will to face family and friends as the acknowledged mistress of the Duke of Lancaster and accept their judgement.

‘Do you deny my power to accomplish it?’ the Duke demanded. ‘I will make you my mistress, and as the woman who is chosen by a prince of the Plantagenet line, you will be answerable to no man.’

But I would be answerable to my own conscience and to God. All I could do was retreat to a dilemma that he must understand.

‘I cannot. I am too far below you, my lord, a mere daughter of a royal official, a widow of a minor knight. But nor am I a court whore, willing to please any man in exchange for nightly gratification and a handful of jewels, as he sees fit. I know what is due to me, just as I know my place in the ordering of worldly affairs, and that place is not in your bed. I cannot accept your invitation simply because…because…’

‘Because I have an itch that is in need of scratching. Is that what you wished to say?’

‘Yes.’

My cheeks were on fire from the deliberate crudity, but the Duke laughed.

‘Your scruples, madam, are magnificent.’

‘I know that you value my service,’ I tried to explain despite the sharp irony, for was he not still smiling at me? ‘I know that you have a kindness for me and my children. I will serve the house of Lancaster in heartfelt gratitude for all you have done for us. But how do you desire me? You loved Blanche to the depths of your soul. Your love for her shone as a bright halo around you, around the pair of you. I know the pain of your grief when she died.’ I held his whole attention now. ‘You have a new and beautiful high-born wife who is carrying your child. She brings you a kingdom, a valuable alliance. She is young and vulnerable and would appeal to your chivalry. Would you not love her too? I know you have a care for her—you treat her as if she is made of fine glass. Why would you not adore her?’

Why did I have a need to say all this? It was fruitless, painting a picture that was far more familiar to him than it was to me. But still I would speak out. I took a breath, flattening my hands, still warmly enwrapped, against his chest.

‘I will not be the mistress of any man who simply wants me for a casual hour of dalliance and a fast satisfaction between the bedsheets,’ I declared, as outspoken as he.

‘And a handful of jewels. So you said.’ The Duke tilted his chin as his eyes gleamed with something like appreciation. I thought I had surprised him after all. ‘That was quite a speech. I knew there was a reason I appointed you as the Duchess’s damsel. I am mightily impressed. Have you finished dissecting my morals and my character?’ he asked. ‘In my own defence then, I worshipped Blanche. Her death near broke my heart. But she is dead three years now, and a flame does not remain alight for ever.’

I thought about this, accepted it. ‘Yet now there is Constanza, my lord.’ The Queen of Castile stood between us, as formidably as if she had stepped into the room.

‘Do you think I dishonour her?’ he asked, his brows angling. ‘Constanza does not love me, nor I her, if that concerns you. It is a political marriage, to our mutual benefit, and one that could bring me great power. I am a man with ambitions that I will not see fulfilled as my father’s third-born son, and so I value Constanza for what she can bring me. I will never show her less than respect. I will do nothing to harm her or cause her distress. I will never hold her up to ridicule or slights in public, but will treat her with every courtesy.’

‘I think you might be hypocritical if you invite me to be your mistress within a six-month of your bridal vows, my lord. And no, I was not dissecting your character,’ I continued, my words carrying an unmistakable burden of acidity. ‘I’ll not be any man’s mistress, to be enjoyed for a few passing weeks of pleasure when the desire runs strong, only to be cast aside when the appetite palls.’

The Duke grinned. ‘I see that you don’t think much of my staying power. I think the pleasure we would find together would be of longer duration than that. Do you think I’d cast you adrift after only a few weeks?’

‘I don’t know.’ And to my dismay I felt the sting of tears. I swallowed hard. ‘I think you do not understand my dilemma. I have a conscience,’ I repeated, feeling that I was fighting a losing battle against his obstinacy.

‘And you think I do not, it seems. What a very low opinion you have of me.’ He shook his head in mock reproof. ‘You have given me a hard task, have you not? I must find a way to prove it to you that an hour or two of dalliance would be most enjoyable.’

‘I defy you to try, my lord. I’ll not be persuaded.’

The Duke stood, pulling me with him, drawing me into his arms when I tried to step back. So we stood, unmoving, breast to breast, thigh to thigh. I thought for a moment, in which I stopped breathing, that it was in his mind to kiss me. Then footsteps sounded in the distance, approaching briskly, and he raised his head.