Why Nick Canon & Mariah Carey's Marriage Broke Down

He recently revealed there was 'trouble in paradise' with it looking likely that his six year marriage to Mariah Carey is heading for the divorce court.

And now, a new report takes a look inside the breakdown of Nick Cannon and Mariah's relationship, suggesting the star's paranoia along with differences over child rearing and spending contributed towards the split.

According to Us Weekly, the marriage has been on the rocks for a while, with Mariah's demanding behaviour beginning to wear thin.

Expecting to regularly 'check in' with Mariah while not at home, Nick apparently failed to make enough contact with his wife.

'She always suspected when he was working that he was somehow out there cheating and she'd be home alone calling Nick 100 times a day,' a source told Us. 'It got to be too much. And he was always faithful.'

But Mariah was still apparently jealous of Nick's previous relationship with Kim Kardashian and was 'furious and humiliated' when the reality star was among the names he listed when quizzed about famous women he'd slept with in a radio interview with Howard Stern earlier this year .

'Mariah hates Kim because Nick really cared about her,' a Kardashian family source told the publication. 

Nick tried to backtrack a week later by claiming on another radio show his wife "doesn't even know who Kim Kardashian is." But the damage was already done.

'He was too open about their marriage for her taste,'  a source revealed to US. 'She's private, and some of the things he revealed in interviews disgusted her. 

That wasn't the only source of disagreement between the couple though. Insiders suggest they also differed on how to raise their three-year-old twins Moroccan and Monroe.

'Mariah loves those kids but she lets them do whatever they want,' the source told Us. 'Nick would be like "Why are you letting them stay up late and eat cookies?" and Mariah would just snap at him not to tell her how to be with her kids. So then he always had to be the bad guy.'

The couple have an ever-increasing roster of nannies, with Mariah admitting earlier this year - while snapping her fingers - that she fires nannies 'like this.' 

She continued, 'I hate doing it but I have to, because if they try to make themselves more important in the babies' minds than me,' she told Power 105.1's The Breakfast Club.'

Mariah, it is suggested, is eager for her children to become musical stars while Nick wants them to enjoy a normal childhood.

'Mommy's making sure they get all the proper training,' he told Us back in March. 'I'm not really a proponent of putting kids into work at all. I think kids should just be kids and have fun.'

In fact, Roc and Roe even make an appearance on Mariah's latest album Me. I Am Mariah... The Elusive Chanteuse.

'I wrote a song for them on this album, and it's called Supernatural, and dem babies are on the song,' she told E! back in April. 'And they were singing this when they were just two. Mainly it's Ms. Monroe singing, and Rock is on there. You'll hear it, I can't give it away. She is actually singing though.'

Despite the adorable guest appearances, Mariah's album recorded her lowest record sales in 20 years. Her once-glittering career is dwindling, while Cannon's has gone from strength to strength.

Along with hosting America's Got Talent, he has several successful business interests including his own company Ncredible entertainment, making him worth close to $70 million. 

'He's in a different stage of his life and his priorities changed,' a insider told Us. 'He's on his way up and she's on her way down.'

But old lavish habits die hard, and Mariah has been 'overspending and draining her fortune.'

The insider told Us: 'A big strain on the marriage has been that he feels he needs to work as much as possible because she's such a money drain. Her glam squad drive him nuts. Mariah travels with six people just to take care of her beauty needs.' 

With a tour for her new album coming up, Mariah's way of coping is to pretend the split isn't happening and throw herself into preparations.

'She is tuning out the bad stuff, and like with everything, she is in her own world,' the insider told Us.

The diva is also reportedly drinking champagne until 7am, not waking up until 4pm, and obsessing over pictures of herself.

'She stays up all night, looking at every frame of herself in every photo and dissecting it to death,' the insider said. 'I would like to say she is horribly upset, but she lives in a fantasy world.

Mariah is said to be consulting divorce lawyers, while Nick is keen to reach a shared custody agreement for the twins. 

'He definitely won't let her have full custody,' a source told Us. 'She can barely take care of herself

The singer has so far not commented on the break up. Her representative told UsWeekly, 'Mariah is focusing on her children and her upcoming tour.'

TMZ recently reported the pair's lawyers struck up a confidentiality agreement, which bars him from sharing details of their divorce - or face 'severe financial penalties.'

Sources told the website that while Nick has been muzzled, his estranged wife has retained rights to announce the split on their own terms.

Mariah and Nick, who have a 10-year age difference and married after just two months of dating, have spent most of 2014 living separately, according to numerous reports.

Normally over-the-top with PDA-filled posts - Nick hasn't tweeted anything about Mariah since November, and she last shared a family portrait for Father's Day in June. 

The duo's last red carpet appearance was at the SAG Awards in January, and their last public sighting was at a February 12 MTV event.