Sins of a Rogue by C.K. Mackenzie

Their marriage of convenience was about to be tested.
Paul left his drinking and gambling life behind him when he married Kaya. Or thought he had. Four months traveling with his beautiful, resourceful wife, gives him a glimpse of peace and happiness he doesn’t believe he deserves. The dark days of his former life are dead and buried and he’ll do anything to keep it that way.

Except the past finds him, and he can’t run from it so easily this time.
Kaya, sheltered her entire life from the outside world, knows two things for fact: She loves Paul with a fierceness that terrifies her. And she’ll fight for the man she knows him to be. Even when his past intrudes into their life and threatens everything they’ve built.

When a good deed turns into a dangerous journey into the world of smuggling and opium, Paul’s darkest secrets threaten their marriage and their lives.