Miss Elspeth's Desire - Imogene Nix

Elspeth Forster, the eldest spinster sister and part owner of Forster Shipping Line has never known passion. 

On the youngest Forster sister’s marriage, Elspeth and her middle sister Isabelle determine to use their ships for more than just business by taking the adventure of a lifetime. In India she might find a man who can teach her all the things that will keep her warm in her advancing age. But she never expected that an unscheduled stop would put her within Aeddan Fitzsimmon’s sights. 

Returning from a top-secret mission, English spy, Aeddan Fitzsimmons, finds passage on the Zephyr, a vessel in the Forster fleet. From the moment he stepped aboard the statuesque redhead entices him like no other ever has. Now in India he has a new mission: keep the elegant Elspeth safe while wooing her into his bed.