Honor Among Vampires - Elizabeth Guizzetti - Bog

Principality of Moldovia, 1509
While her beloved husband is away at war, Agata manages their estate and dairy. One night, she is called to assist a first-year heifer. She does not know a vampire lurks in the darkness. Agata wakes in the birthing barn disoriented, wounded, bitten, and defiled. Her son is injured, but alive. The herdsman is discovered with his throat gnawed open. Several cows are missing.
Plunged into a strange existence of monstrous cravings, she moves to secure her children's futures before the details of the attack is known. News spreads quickly in her village. With the conviction she might regain her honor by defeating the vampire, Agata leaves her parish. Unaided, she crosses the mountains to an ancient crumbling Roman fort where it is said the vampire resides. However, the vampire doesn't live alone.