It isn't just the tennis pro—there's a whole new crop of predators after her.

-By Peter Rubin
-Photograph by Michael Lewis

Jack, an entrepreneur, had just turned 40, and life was good. He and his wife, Amy (their names have been changed), had three kids and were well-liked in their small suburban town in New England. Then Jack started a home-renovation business, threw himself into his work, and hired a 26-year-old guy who was new to town to be his assistant. Not long after, Amy offered to show the kid around. She told Jack that she was helping his assistant find an apartment, but actually the two of them were sneaking off to a hotel to have sex—regularly. When Jack found out, Amy revealed the hard truth: This guy may not have been husband material, but he was far more interesting and exciting than the absentee spouse Jack had become. He was charming, handsome, and apparently unfazed by the fact that Amy was married.