Mrs. Balfame by Gertrude Atherton (1857 - 1948)

Enid Belfame: 42 years old, 22 of them as a married woman; eminently respectable; founder of The Friday Club; small town dignitary; a paragon of virtue. But does she have what it takes to commit murder? And will the young and handsome Dwight Rush benefit if she does? - Summary by Lynne Thompson