Gentle Rogue by Johanna Lindsey

Heartsick and desperate to return home to America, Georgina Anderson boards the Maiden Anne disguised as a cabin boy, never dreaming she’ll be forced into intimate servitude at the whim of the ship’s irrepressible captain, James Mallory.

The black sheep of a proud and tempestuous family, the handsome ex-pirate once swore no woman alive could entice him into matrimony. But on the high seas his resolve will be weakened by an unrestrained passion and by the high-spirited beauty whose love of freedom and adventure rivals his own.