
Dubbed "the godmother of infidelity research" by The New York Times, Dr. Glass reveals why good marriages fail. Can friendship cross invisible boundaries? Discover why Oprah featured this groundbreaking work that transformed how therapists - and couples - understand modern betrayal.
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Imagine discovering that your spouse's "innocent" friendship has been hiding something devastating. In today's connected world, affairs rarely begin with sexual attraction-they start with friendships that gradually cross boundaries. This pattern has become so common that psychologist Shirley Glass found 82% of unfaithful partners had affairs with someone who started as "just a friend." The workplace has become particularly dangerous territory, with 62% of unfaithful men and 50% of unfaithful women meeting their affair partners at work. What makes these relationships so threatening is their gradual evolution. They develop incrementally through small boundary violations that go unnoticed until participants find themselves sliding down a slippery slope. The progression follows a predictable pattern: two people begin sharing work concerns and casual conversation, then gradually start confiding personal struggles and marital dissatisfactions. Emotional intimacy deepens before any physical lines are crossed. Glass's brilliant "walls and windows" metaphor perfectly captures what happens. In healthy marriages, partners maintain windows of transparency between them while building protective walls against inappropriate outside relationships. Affairs reverse this arrangement-creating walls of secrecy that shut out the spouse while opening windows of intimacy with someone else. When a friend knows more about your marriage than your spouse knows about your friendship, you've already crossed a dangerous line.
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