Watch Over Me by Christa Parrish

Deputy Benjamin Patil is the one to find the infant girl--hours old, abandoned in a field. When the mother ecan't be located, Ben and his wife, Abbi, seem like the perfect couple to serve as foster parents. But the baby's arrival opens old wounds for Abbi and shines a harsh light on how much Ben has changed since a devastating tour in Afghanistan. Their marriage teeters on the brink and now they must choose to either reclaim what they once had or lose each other forever.