Lady Drusilla's Road to Ruin by Christine Merrill

Drusilla was a damned attractive woman, but seemed unaware of the effect she had on the men around her, wandering about alone and putting her virtue at risk. Any feelings John had for her were not a symptom of fickleness. They were proof that he was male.
    But when she’d said she had an ‘understanding’ with the gentleman they were chasing, his first thought had been, At least you are not yet married. As if that would matter. Even if she was unattached, she was a duke’s daughter and he was the bastard of who knew who.
    Of course, she had said her Gervaise was a plain mister and not the Marquis of Gretna Green. It seemed that if the lady’s heart was engaged, a title was not required. And John knew himself to be a better man in one respect. No matter what the circumstances of his birth, at least he was not the sort who made promises to one lady and ran for the border with another.
    He had half a mind to thrash sense into this Gervaise fellow for running off on her. Though Lady Dru’s tongue was sharp, she deserved better. That John would find himself rushing her north and into the arms of such a lacklustre lover was an even sharper irony. It was too like the part he’d played in the reconciliation of Emily and her husband.
    He’d told himself often enough that his own parentage was not a reflection of his worth as a man. But when given a chance to test the theory, society always proved the opposite. And if Lady Dru was eager enough for her Mr Gervaise to set off cross country without a feather to fly on, hoping to win him back, then she would not be interested in some itinerant gentleman she met in the coach, even if that man was unwise enough to take a fancy to her.
    Which he did not mean to do. John thought of a certain amiable widow who lived near the Folbroke country estate. It had been some months since his last visit to her. The extended period of celibacy must be addling his brain. Though he never seemed to be the target of it, the haze of feminine lust around his recent employers had raised something in him that was nothing more than envy disguised as infatuation and a desire to take care of natural and unmet needs.
    When the carriage had got stuck, as he’d known it would, it had been almost a relief to exercise some of demons from his brain with pushing on the thing. Of course, to do it he had taken his employer in his arms and taken her to high ground, which had only made things worse. She was curvy under the simple gown she wore. And she had clung to his neck as though she’d enjoyed it, her red lips parted in surprise at how easily he’d carried her. He’d set her down quickly, out of the mud, before she could notice her lapse and his impropriety. If she spotted it, she would scold him for it, putting up barriers of rank and bad temper that were not the least bit threatening, once one knew her.
    Strangely, he felt he did know her. Perhaps he was reading too much into the intent way she looked at him, or how easy it had been to talk to her on the previous evening, when they had been alone and no one could hear.
    Then there had been that moment of awkwardness she’d displayed earlier, when she’d said she had not danced at Almack’s. She must have meant that she had no permission to waltz and that she would not have been so rude as to slight any partner. For a moment, it had almost sounded as though she was woefully inexperienced in the arts of society and had some personal reason not to give him up when he’d held her.
    He shook his head. He was dreaming again. If he was fortunate, at the end of the journey he would find a Scottish widow sympathetic to his plight, and he would regain his equilibrium.
    As he led the horses back to Lady Dru, he put on his most proper and deferential air, getting clear in his own mind the distance between them and the relationship they must have: respectful courtesy on his part and complete indifference on hers.
    She looked dubiously at the horses, which were