Brides of Waterloo Series by Annie Burrows

His virgin mistress! Major Tom Bartlett is shocked to discover the angel who nursed his battle wounds is darling of the ton Lady Sarah Latymor. One taste of her threatens both her impeccable reputation and his career! An honorable man would ask for her hand, but Bartlett is considered an unrepentant rake by polite society; sweet Sarah would be spurned as his mistress and even as his wife. He demands she leave, but Sarah is just as determined to stay by his side—and in his bed!