An Earl, His Valet, & Their Wife by Nicola Davidson

For five blissful years, Michael Ellis, Earl of Whitmore and his Scottish valet Gerard Hunter have been London’s happiest secret couple. Now shy, submissive Michael needs an heir…and the only solution is a marriage of convenience.
Desperate to flee an oppressive household, bluestocking Lady Katherine Kirk seizes upon the handsome earl’s unexpected proposal. However, after an unfortunate wedding night, it is dominant Gerard’s stern guidance that changes everything. As feelings grow and the trio leave no carnal desire unexplored, they dare to dream of a future together. But a determined enemy will stop at nothing to destroy their hard-won love…