What is the theme in The Sex Chronicles: Shattering the Myth by Zane?

A frequently recurring theme in "Sex Chronicles: Shattering the Myth" is that of infidelity. In her Disclaimer, Zane claims that she is not trying to promote extramarital affairs, signaling that infidelity will be a topic in the stories. Clarence, from "Be My Valentine", meets Yardley when she delivers a singing telegram from Shannon, his unfaithful ex-girlfriend. In "The Godfather", Janel cheats on Tyler, her husband, with his best friend, Norman. In "Wrong Number", Amber is unfaithful to Tony, her live-in boyfriend, with Rob after Rob mistakenly calls her telephone number.