What the Duke Doesn't Know — Jane Ashford

A proper English wife, or the freedom of the sea?
Lord James Gresham is the fifth son of the Duke of Langford, a captain in the Royal Navy, and at a loss for what to do next. He's made his fortune; perhaps now he should find a proper wife and set up his nursery. But the sea calls to him, while his search for a wife leaves him uninspired. And then, a dark beauty with a heart for revenge is swept into his life.

He can't have both, but he won't give up either
Half-English, half-Polynesian Kawena Benson is out to avenge her father and reclaim a cache of stolen jewels. There's nothing for James to do but protest his innocence and help Kawena search for the jewels, even though it turns his world upside down.