His Philanthropic Lady: A Regency romance (Regency Lady #3)
Susan Leona Fisher

Attending a friend’s wedding, she encounters Sir Edward Derringham, who has recently finished with his latest mistress and is open to new possibilities. When Susannah’s thoughtless behaviour causes him to land in undignified fashion in a heap on the road, he decides the young woman needs teaching a lesson. Aware of her determination not to marry, he calls upon her father to request her hand.
The campaign that follows is reminiscent of his time in the army, but also requires him to take a hard look at himself and his life-style. Unbeknownst to them both, a jealous society lady is spreading rumours about Susannah, intending to get her into trouble with the Church authorities. Are the rumours true? Can her reputation survive? And will Edward still want her?