Bad Moon Rising — Cheryl Norman

A romantic suspense novella...

In 1969 Missouri, Celeste Lucas mourns her husband, a victim of a kidnapping gone deadly wrong the previous year. But she discovers disturbing secrets about the man she thought she knew. Jack Lucas harbors a secret love for his sister-in-law, one he's tried to forget. Then she shows up asking for his help. Should he tell her his suspicions about his brother, or does he have a serious conflict of interest?