Shadows on the Sun — Kathryn Haig

... to Michael, her husband, lonely and reserved, she is both angel and whore. ... to Adrienne, fleeing the destruction of her homeland by the Kaiser's army, she is an unnatural mother.

... to Hector, shell-shocked and tormented, she is the woman who has ensnared his brother and brought two families to the brink of tragedy.

After a war that has savaged a generation both physically and spiritually, the affluent classes find themselves cast dangerously adrift from their Edwardian certainties. For Michael and Helen -- for all of them -- nothing will ever be the same again.