Daughter of the Sea by Sylvia Broady
Jessica is grieving for her beloved father, trawler owner Jacob Kingdom, when a heated confrontation ends with her being cast out from the family home and the revelation of a shameful secret. She falls upon the kindness of strangers and meets a charismatic trawlerman, who is proud to walk out with Kingdom's daughter. But with her cold-hearted brother at the helm of the family business, there is discontent rising, and being Kingdom's daughter begins to lose its charm. With Jessica desperate to prove herself worthy, does she have what it takes to weather the storm to come, or will her secret hold her back?