The Shepherd's Wife,Jerusalem Road Series by Angela Hunt and published by Bethany House.
Yeshua of Nazareth has two sisters: Damaris, married to a wealthy merchant's son, and Pheodora, married to a simple shepherd from Bethlehem. When Pheodora's husband suffers an unexpected reversal of fortune and is thrown into debtor's prison, she returns to Nazareth, where she pins her hopes on two she-goats who should give birth to spotless white kids that would be perfect for the upcoming Yom Kippur sacrifice.
In the eighteen months between the kids' birth and the opportunity to sell them and redeem her husband from prison, Pheodora must call on her wits, her family, and her God in order to provide for her daughters and survive. But when every prayer and ritual she knows is about God's care for Israel, how can she trust that God will hear and help a lowly shepherd's wife?