Three Sins and a Scoundrel - Tracy Sumner

Meet the newest member of the Leighton Cluster! The final novel in the popular Duchess Society series by USA Today bestselling author Tracy Sumner!
Beneath his disguise lies a secret life...and a secret love.
Jasper Noble is the most feared man in London, a ruthless scoundrel with a reputation as dark as the rookery alleys he prowls. But behind the grim facade lies a man of hidden nobility with a past shrouded in mystery. Once a gentleman, Jasper's life was torn apart by love's betrayal, forcing him into the shadows of espionage and intrigue.
However, he's never forgotten the woman he lost.
Cece Willoughby married to save her family from ruin, yet her heart remains chained to memories of the man she once adored. A widowed countess with the freedom to live as she chooses, she returns to London to find the life-and the man-she left behind. When fate brings them face to face, their long-buried passion flares anew. The love they tried to forget burns as brightly as ever.
Cece finds she must fight for their future, for the only man to capture her heart isn't willing to forgive her for leaving him. Jasper, meanwhile, must decide whether to keep his secrets or embrace a second chance at love.
In a world where every truth is a weapon and every love is a risk, can they overcome the barriers that threaten to keep them apart forever?