Indiscreet (The Horsemen Trilogy)

From New York Times bestselling author Mary Balogh comes the first novel in the Horsemen trilogy, a scandalous romance of yearning passion and dangerous desires...
 
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....