In the Roar of the Sea by Sabine Baring-Gould

Poor little fool! Shrewd in maintaining her conflict with Cruel Coppinger -- always on the defensive, ever on guard, she was sliding unconsciously, without the smallest suspicion of danger, into a state that must eventually make her position more desperate and intolerable. In her inexperience she had never supposed that her own heart could be a traitor within the city walls. She took pleasure in the society of Oliver, and thought no wrong in so doing. She liked him, and would have reproached herself had she not done so.

Her relations with Coppinger remained strained. He was a good deal from home; indeed, he went on a cruise in his vessel, the Black Prince, and was absent for a month. He hoped that in his absence she might come to a better mind. They met, when he was at home, at meals; at other times not at all. He went his way, she went hers. Whether the agitation of men's minds relative to the loss of the merchantman, and the rumors concerning the manner of its loss, had made Captain Cruel think it were well for him to absent himself for a while, till they had blown away, or whether he thought that his business required his attention elsewhere, or that by being away from home his wife might be the readier to welcome him, and come out of her vantage castle, and lay down her arms, cannot be said for certain; probably all these motives combined to induce him to leave Pentyre for five or six weeks.