Bride trilogy (Mary Jo Putney)

A mad heiress and a false fiancé... The younger son of an earl, Dominic Renbourne is offered an irresistible bribe by his arrogant, identical twin brother, Kyle, who is heir to the earldom. All he must do is take Kyle's place at Warfield Manor, where he is to politely court Lady Meriel Grahame, the orphaned and vastly wealthy heiress Kyle is pledged to marry. The deception need only take a few weeks and no one will be the wiser because the fey Lady...

Alexandra Warren ventured to Australia as a young bride eager for adventure. A dozen years later she is returning home as a widow and mother when a pirate attack separate her from her beloved daughter and condemned Alex to a life of servitude