David Letterman's spokesman has denied a report claiming the U.S. television star's wife has left him in the wake of his recent sex scandal and extortion case.

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"The National Enquirer has it wrong," Letterman's representative Tom Keaney told the New York Daily News.

Letterman admitted on the "Late Show with David Letterman" last month that he has had sexual affairs with female employees of the show. The on-air revelation came after he testified before a grand jury that a man threatened to release the information to the public if Letterman did not pay him $2 million.

A CBS News producer, Robert Halderman, was arrested and charged in the alleged extortion plot. He pleaded innocent and was released on bail.

Letterman has publicly apologized to both his staff and wife, Regina Lasko, whom he married last March after dating her for 20 years. The couple have a 6-year-old son together.

The Enquirer quoted an unnamed "Late Show" source as saying Letterman's wife recently initiated a separation after he declined to discuss in depth the women with whom he had relationships while he was also with her.

"I don't know anything about that," Letterman's mother, Dorothy Mengering, told the Daily News.