The Ones Who Matter Most by Rachael Herron
After her husband dies unexpectedly, Abby Roberts finds wedding photographs of him with another woman, along with pictures of a baby boy. Shocked, she does something utterly impulsive: She embarks on a journey to discover the family her husband apparently left behind. What begins as one woman is search for truth becomes a deep bond forged between the unlikeliest of people, and the discovery that there are many ways to create a family - as long as you take care.