Hearts at War (Wesson)

To keep her children, another woman has to die.

Germany 1939–To save her baby, Trudi Beck must hand her over to strangers who will take her across the sea to a foreign country. Trudi has already lost her husband to the Nazis, her stepsons are taking the train too. Walking away from the train station with empty arms is the hardest thing she's ever done.

London 1939–Newly married, Sally Matthews, is alone again. Her husband is away training for war, leaving her days and home empty. She volunteers to help with the children from the Kindertransport, becoming captivated by five-year-old Tom and his baby sister, Liesel. Their elder brother, Heinz, is a different story. His attitude, after a period in Dachau concentration camp, makes him difficult to love. 

1945–Five years of war, with Heinz pulled from her family and sent to an internment camp, Sally has to explain to Tom and Liesel what the end of the war means. Return to Germany for the children, hopefully to a surviving family member. Perhaps Trudi has survived the war. Tortured Sally doesn't wish Trudi harm, but Sally can't let go of her children no matter what others say.