The Stormswept Stowaway by Ellie St. Clair

Desperate to escape an arranged marriage, Penelope Carstairs stows away on what she believes to be a merchant ship, eager to find her uncle and join his crew once more. It doesn’t take her long to realize she has made the worst mistake of her life and soon she is held captive, desperate for escape once more.
Captain Ramsay of the feared pirate ship, The Raven’s Wing, has one objective in mind — to chase down his nemesis, Captain Ortego, and take his hoards of treasure for himself. When Ramsay captures a stowaway, he knows he should be rid of the tempting vixen as quickly as possible, but cannot risk her exposing his whereabouts.
Penny is afraid of losing her life, while Ramsay fears a woman aboard. Forced to share close quarters, they find they find themselves in a clash of wills… but soon realize it’s their hearts that are most at risk.