Sources say Mariah Carey and "America's Got Talent" host Nick Cannon are headed for a split and “living separately” after she hired security to keep him away from other women.

According to the NY Post, Mariah and Nick are separating after six years of marriage.

“He hasn’t been staying at their home. He’s been living out of hotels. They’re fighting a lot.”

Allegedly, Mariah suspected Nick of cheating. And when he hosted pool parties in Las Vegas earlier this year, Mariah sent a security guard to keep watch over her husband. “The security guard wasn’t there to keep the girls away from him. It was to keep him away from the girls.”

Mariah also didn’t want Nick drinking while at the Vegas gigs because she felt he “gets in trouble when he drinks."

Thirty-three-year-old Nick and 45-year-old Mariah married in 2008. They became parents in 2010 to twins Moroccan Scott and Monroe.

Rumors swirled this week that the couple were set to officially announce their breakup, and that Nick had been staying at his grandparents’ house during a trial separation.

Tell-tale?: In July, they put their $13 million Bel Air mansion up for sale.