Not "Just Friends"

Rebuilding Trust and Recovering Your Sanity After Infidelity

Shirley P. Glass, Jean Coppock Staeheli

14 min read
1m intro

Brief summary

This book argues that affairs usually begin gradually through secrecy and emotional closeness rather than reckless decisions. It explains how hidden intimacy damages trust and what is required for a couple to heal.

Who it's for

This is for anyone seeking to understand how affairs happen, what to do after discovery, or how to protect a relationship from infidelity.

Not "Just Friends"

Audio & text in the Readsome app

How Affairs Begin

Affairs often start in ordinary places, not in obviously reckless situations. Many begin between coworkers, friends, or people who spend repeated time together while working toward shared goals. The people involved usually do not set out to destroy their relationship at home. They drift into deeper intimacy one conversation, one confidence, and one secret at a time.

A strong marriage does not automatically protect against this. Love and loyalty matter, but they are not enough without clear boundaries. Attraction to other people does not disappear after marriage. Faithfulness depends less on never noticing attraction and more on what a person does next.

Infidelity is not limited to sexual intercourse. A relationship becomes unfaithful when emotional or sexual intimacy is hidden and that secrecy violates the trust of the primary partnership. Emotional sharing, private fantasies, flirtation, and sexual chemistry can all cross the line before a couple ever becomes physical.

Work has become one of the most common danger zones. Long hours, travel, teamwork, and shared stress create fast emotional closeness. Digital communication adds another layer, making it easy to maintain a private channel of contact through texts, email, or social media. Old flames also carry special risk because they revive unfinished feelings and fantasies about what might have been.

The most useful guide is simple. In a healthy relationship, partners keep a wide window open between themselves and build a wall against outside romantic intimacy. Trouble starts when that pattern reverses, when the spouse is shut out and the outsider gets the most personal access.

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About the author

Shirley P. Glass

Shirley P. Glass was a licensed psychologist and a leading researcher on the causes of infidelity, referred to by The New York Times as "the godmother of infidelity research." For over 25 years, she treated hundreds of couples in her private practice and conducted extensive research on extramarital relationships, challenging common misconceptions and clarifying gender differences in infidelity. Her work, which began in 1975, has had far-reaching contributions to the field of psychology and therapy.

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