Her Impeccable Scoundrel. Wicked Widows League, #44

Anxious to save a cherished inheritance, Blythe Blatchfield, widowed Countess of Chilcombe, knows she must repair her reputation with the Beau Monde in order to face the powerful marquess challenging her dissolute husband's will. She vows to resist handsome rogues like her late husband, and to never again give her trust so blithely. But when the new earl, absent from England for many years, finally appears, new rumors swirl around Blythe.
Facing the loss of everything, she finds herself needing the help of an old enemy, the man whose interference years earlier led to her unhappy marriage, the new Earl of Chilcombe. Called back to England to take up his late cousin's title, diplomat Graeme Blatchfield is eager to see his cousin's widow and learn for himself whether the rumors about the woman he once held a childish infatuation for are true.
Having plunged into marriage with the last earl-Graeme's fault for revealing their tryst-she's been tainted by her husband's decadence.  Forced by matters of the estate to spend time together, he soon discovers the vulnerable and lonely woman underneath the society mask. Can he get her to forgive him-and more?