Indiscreet (Book 1 0f The Horsemen Trilogy)

In the country visiting his twin brother, Viscount Rawleigh longs for a little diversion and beautiful young widow Catherine Winters seems like easy prey. But Rex's target is a lady of virtue, and when she roundly rejects his improper proposal to become his mistress, Rex finds himself faced with a delectable challenge. Catherine knows she must fight the indecent feelings the Viscount arouses within her--feelings that bring to life a past she had sought to escape--even as the handsome lord refuses to relent in his amorous attentions. But even though she knows one kiss could bring her to ruin, temptation proves an insurmountable foe--and Catherine can not ignore the beating of her treacherous heart....