Red Sky at Dawn - Star Frost Lovers, #4

Red sky at dawn, sailors take warn. Miss Tessa George is the epitome of a failed debutant. At twenty six, and as the oldest of her three sisters, she's on the shelf and officially off the market. When everything about her is wrong, the only right thing to do is exactly what is demanded. Move to a remote island with her newly wedded sister and live out her life as a companion. Tessa left the only life she knew, but what she found on the ocean was more than she could ever dream. Captain Cristian is a bastard, in no uncertain terms.
Raised in a convent, he escaped as a boy entering a life of perpetual poverty and crime. That is until Marco de Alejandro took him under his wing, raising him to be a skilled captain and take over Marco's thriving merchant fleet. But Marco wasn't always a wealthy merchant and Cristian didn't earn his reputation as a fierce captain for hauling silk and tea across the oceans.   Red sky at night, sailors delight. On an island as mysterious as Star Frost, nothing is as it seems.
Tessa's life as a companion has turned into unfettered freedom to explore who she is and the adventures Star Frost has to offer. Cristian offers to help her, as a friend, but friends don't kiss.or keep secrets. As they surrender to the desire between them, Cristian tries to keep his distance to protect her from his dark past, but unlike treasure, some enemies won't stay buried forever.