David Letterman‘s sensational sex scandal has triggered a $300 million divorce war between the 62-year-old talk-show host and his outraged wife Regina, say sources close to the star.

The couple – who lived together for years before marrying March 19 – are fighting over everything from his extensive property holdings to custody of their son Harry, 6, according to insiders.

"It’s become a real battle," revealed a Late Show insider.

"Regina is humiliated, and she wants to get even with David for his public admission he cheated on her repeatedly during their 23-year relationship."

Letterman stunned his fans when he confessed on-air to having sex with female employees and revealed he had become the victim of attempted blackmail.

The ENQUIRER was told the kinky late-night host maintained a fully equipped love nest, likes to play "dress up" – and even had a girlfriend parade around with a set of pom-poms pretending to be a cheerleader.

Letterman owns a very successful production company – ironically named Worldwide Pants – plus a fortune in real estate, and boasts an annual income of more than $45 million.

Sources describe her as "mortified" that David carried on sexual relationships with a number of his female staffers – including former assistant Stephanie Birkitt.

Birkitt, now 34, lived with CBS’ "48 Hours" producer Robert "Joe" Halderman, 51, the man who allegedly tried to extort $2 million from Letterman. AND according to sources, Stephanie was still seeing Dave on the sly!

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