Enemies of the heart

the long version

"Berlin 1909 - cousins Vicky and Zelda are about to meet the Remer brothers... Vicky Hudson is only seventeen when she marries Berthold Remer and moves from her idyllic Yorkshire home to Berlin. Adjusting to her new life isn't easy, not least when she discovers that the Remer family are producing weaponry for the German army. With war looming, Vicky flees with her children, leaving Berlin, and her husband, behind. Her cousin, striking beauty Zelda Wallace, is eager to meld into Berlin's high society and sever all ties with her American identity, but beneath her exotic looks, Zelda holds a deeply hidden secret that if revealed, could threaten everything she holds dear."--Publisher description.