The Castle Inn by Stanley J. Weyman

Let not those who would judge her harshly forget that Julia, to an impulsive and passionate nature, added a special and notable disadvantage. She had been educated in a sphere alien from that in which she now moved. A girl, brought up as Sir George's cousin and among her equals, would have known him to be incapable of treachery as black as this. Such a girl, certified of his love, not only by his words and looks but by her own self-respect and pride, would have shut her eyes to the most pregnant facts and the most cogent inferences; and scorned all her senses, one by one, rather than believe him guilty. She would have felt, rightly or wrongly, that the thing was impossible; and would have believed everything in the world, yes, everything, possible or impossible -- yet never that he had lied when he told her that he loved her.

But Julia had been bred in a lower condition, not far removed from that of the Pamela to whose good fortune she had humbly likened her own; among people who regarded a Macaroni or a man of fashion as a wolf ever seeking to devour. To distrust a gentleman and repel his advances had been one of the first lessons instilled into her opening mind; nor had she more than emerged from childhood before she knew that a laced coat forewent destruction, and held the wearer of it a cozener, who in ninety-nine cases out of a hundred kept no faith with a woman beneath him, but lived only to break hearts and bring grey hairs to the grave.