London - Nick Cannon is reportedly "living out of hotels".
The 'America's Got Talent' host and wife Mariah Carey - who have four-year-old twins Moroccan and Monroe together - are said to be "living separately" following a series of rows.
A source said: "He hasn't been staying at their home. He's been living out of hotels. They're fighting a lot."
Another insider claimed Mariah, 45, has grown increasingly suspicious of her 33-year-old spouse - who she married in 2008 - and even hired security to keep him away from women when he hosted pool parties in Las Vegas earlier this year.
The source told the New York Post newspaper's Page Six column: "The security guard wasn't there to keep the girls away from him.
"It was to keep him away from the girls."
The 'Hero' singer is said to have told Nick she didn't want him drinking at the Las Vegas shows because she felt the comic "gets in trouble when he drinks."
The pair are usually very active on social media but have not been pictured together for months and Mariah hasn't mentioned her spouse since June.
The 'Fantasy' singer - who was married to record company boss Tommy Motola from 1993 to 1998 -- and Nick put their mansion up for sale in July. - BANG Showbiz