Three Hearts — Sue Perkins

Darcy refuses to believe he's telling the truth, but doubts enter her mind when he proves he married her sister. Would Travis kidnap her beloved niece and disappear with her to America? The long wait for the DNA results gives her time to think. She decides to do what's best for Brooke, even if it means letting the child go. Her life would be meaningless if this happened - unhappy and lonely.
Travis is suspicious of her change of heart, but Darcy has a bigger problem than his skepticism. She is falling in love with her niece's father.