A Bad Conscience — Jan Roffman

Socially prominent Beth Hammond had married David Stair over her mother's objections; David was an amiable man who never quite made a living, who spent his weekends alone in the country painting trees...

But was it possible that this mild-mannered man was a murderer? For a woman with whom he had apparently been having an affair was found dead - and even as David denied everything, the finger of suspicion pointed directly at him.

Beth realized with sudden shock that she really didn't known her own husband. And until the mystery was solved, could she continue to live with him - at best, a liar; at worst, a murderer? More important, she herself might be in danger, for David - or someone - had killed once; would he be driven to kill again? And who would be the next victim...?