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With cheating in a relationship, whether physical or emotional, it's typically clear when things have gone too far — but what about your partner seemingly turning up the charm for a friend or ...

Sometimes, the most painful thing isn't discovering an obvious betrayal, but living with the persistent feeling that something's just not right. There are no hidden messages on the phone, no foreign ...

In 1992, a now-classic article in the behavioral sciences was published in Psychological Science. David Buss and his colleagues provided evidence for the existence of substantial sex differences in ...

A recent survey explored U.S. citizens’ perceptions regarding emotional and sexual infidelity, and its results were nothing short of fascinating. Here’s what was found. Where do you draw the line when ...

Cheating. Just the word can stir up strong emotions and heated debates. What defines infidelity in a committed relationship? While the traditional view focuses on physical cheating, the rapid ...

At first, his relationship with Claire seemed innocent enough. They were old friends—longtime colleagues, in fact. Plus, she was married and we were happy. Or, so I thought. Then, she got divorced and ...