Gwen Stefani recently revealed her split from husband of 13 years Gavin Rossdale was completely 'unexpected'.
And it has now been alleged that Gavin was cheating on the No Doubt singer for three years with their family nanny Mindy Mann, who was charged with looking after their three sons Kingston, nine, Zuma, seven, and Apollo, 20 months.
The new issue of claims the Bush rocker initially denied having an affair with the child minder after another one of their nannies supposedly discovered messages and nude photos on the family's iPad and informed Gwen.
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Why it ended: It has been alleged Gwen Stefani and Gavin Rossdale split because the Bush frontman was having an affair with the family's nanny - Mindy Mann - she is pictured here with the singer in 2010, and the couples sons Zuma and Kingston
Explosive claims: The new issue of Us Weekly has made the claims, and says the couple's marriage imploded when the Voice mentor found 'explicit' photos and messages on the family iPad
MailOnline has contacted both Gwen and Gavin's spokespeople for comment.
Gavin, 50, is said to have initially brushed the messages off as 'flirtation', before allegedly confessing to adultery months later, the magazine reports.
It 'completely devastated her,' a source told Us. 'She was mortified, livid, and embarrassed.'
The supposed liaison is alleged to have lasted for more than three years, including the period when Gwen was pregnant with their youngest child Apollo.
Denial: Gavin, pictured here with Mindy and son's Kingston and Zuma in 2010, is said to have initially brushed off Gwen's accusation, saying it was a 'flirtation', but he then confessed
Long time: The alleged affair is claimed to have gone on for three years - Gwen and Mindy are pictured here with in Jan 2010 Kingston and Zuma
A source told the magazine: 'This was done right under Gwen's nose' - she is pictured here with Australian Mindy in Sept 2014
A source added: 'This was done right under Gwen’s nose.'
According to the publication, the singer confronted her husband about his affair on February 9 this year.
When he confessed, she knew their marriage was over.
The magazine details that the Australian sent Gavin several nude photos of herself, and the texts also included arrangements for her and Gavin to meet up and have sex.
For Gwen, it was apparently not just the affair that broke her, but also the fact her husband had been having it with a woman she knew and trusted, who looked after their children.
First worked: Gwen first employed the nanny back in 2008 she is pictured here with her and two of her sons Kingston and Apollo
Time together: Gavin and Mindy would often spend time together with the couple's children - they are pictured here in Malibu with Zuma in July 2014
Mindy was fired as soon as the singer had confronted her husband.
Gwen first employed the nanny back in 2008 - she started working with the family as a fill in and then became permanent.
The blonde seemed delighted to be in the couple's household - according to a family source, she 'began to post pictures on social media dressed in a similar way to Gwen.'
To close for comfort? Gavin and Mindy are pictured here on a hike together in 2012 - when Gwen saw the pictures she was unhappy
Explanation: According to the magazine, Gavin's circle tried to suggest to the press at the time the photos were of him and his sister - by this point he was allegedly in the throes of an affair with Mindy
Mistaken identity: Gwen is pictured here with Gavin's sister Soraya here in London in 2011
In 2012, pictures emerged of Mindy and Gavin on a hike together - he was seen touching her backside as they walked.
Gwen was understandably upset by the images - a source told the magazine her suspicions were aroused.
Meanwhile insiders in Gavin's circle explained away the seemingly intimate gesture by telling the press the girl in the photos was the rocker's sister - Soraya.
Like your clothes, like your man: Friends felt despite trying to be discreet about their knowledge of what was going on it was getting harder to keep it quiet
Like your clothes, like your man: However friends felt despite trying to be discreet about their knowledge of what was going on it was getting harder to keep it quiet
However it was Mindy - and she and Gavin were already allegedly in the throes of an affair.
Friends and those close to Gwen tried to be discreet - but it was apparently obvious that Mindy and the Bush frontman were more than just employer and employee.
Gwen, who has a strong Catholic faith, was determined to keep her marriage together for the sake of her children, and also because she did not believe in divorce.
It wasn't until the blonde singer discovered the text messages and photos, that she had proof she couldn't ignore.
When Gavin is said to have initially denied having an affair with Mindy, it was a second nanny confirming the pair's relationship which made the singer decided enough was enough.
She filed for divorce on August 3.
On Wednesday, a women who called herself Jessica called into the to insist UsWeekly's report was not true.
The friend of Mindy's added Mindy knew the story was coming out and knew she would be blamed for Gwen and Gavin's split, but it is a lie.
The claims come just after Gwen, whose divorce was finalised in October, sat down with 's Jojo Wright on Monday and talked about her 'unexpected' split with ex-husband Gavin.
In real life: Her relationship with her ex-husband, Gavin (pictured in September 2014), is believed to have been the inspiration for her song, Used to Love You
The 'unexpected' ending to her marriage played out in her songwriting.
'I had been writing because my life blew up,' she said. 'Everybody knows that my life blew up last February. I'd just been dealing with that. Unexpected. I was going along thinking that was going to be the rest of my life and it's not. I don't know what happened,' she confessed.
Her relationship with her ex-husband is believed to have been the inspiration for her song, Used to Love You, as it opens with these lyrics: 'Yeah, boy. Never thought this would happen. I let it sink in. You're gone. I don't know, know what I'm feeling. I must be dreaming. You're gone.'
Hers and his: Gwen (pictured in December of last year) allegedly opted not to give spousal support to her ex, as she is worth an estimated 80 million, while he is estimated at 35 million
When she was at a low, that's when the words flowed freely.
'There was one night, the epicenter of the whole thing - that's the most I can say about that - and the next day I wrote the chorus to Used to Love You. But I didn't know it was Used to Love You. I just had written all this stuff and it had happened to be in there buried in a bunch of lyrics that I had written.'
In August, the parents to Kingston, aged nine, Zuma, aged seven, and Apollo, aged one, both filed for divorce, reported. It was finalized in October of this year. Gwen allegedly opted not to give spousal support to her now ex-husband, as she is worth an estimated 80 million, while he is estimated at 35 million.
A new song: Since her divorce, the singer began dating her Voice co-star, Blake Shelton, pictured in a promotional photo for the show
Since her divorce, Gwen began dating her Voice co-star, Blake Shelton.
In early November, her rep confirmed the news to after the duo was spotted together over Halloween weekend.
The country crooner was previously married to fellow singer Miranda Lambert before the couple split in July, after four years together.
Gavin Rossdale is not the first celebrity husband to allegedly have had a romance with the family nanny.
It was in June this year Ben Affleck, 42, and Jennifer Garner. 43, announced the end of their 10 -year marriage.
But just four weeks after their split became public knowledge, suggested the actor, had been enjoying a romance with the family's nanny Christine Ouzounian.
The 28-year-old started working with the couple's three children Violet, nine, Seraphina, six, and Samuel, three in the Spring, when they were going through a 10-month trial separation.
It was claimed there was a mutual attraction between the pair - but when Jennifer allegedly found out there was 'something going on' she let the nanny go.
However in the wake of being told to leave, Christine was seen at Ben's new L.A.-area rental on July 17 and the duo were corresponding constantly over text and email.
When the claims went public she spent a week staying in the Beverly Hills Hotel, a stay which was allegedly paid for by the Oscar winner.
Ben has always denied anything went on between them and that he was paying for her accommodation.
Actor Ethan Hawke told in 2009 that his marriage to Uma Thurman was 'over' when he began romancing their two children's nanny, Ryan Shawhughes.
The 44-year-old Oscar nominee - who was caught kissing a 22-year-old in a Montreal bar at the time - blamed Uma's more successful career for the breakdown of their five-year marriage.
He always maintained their romance began after he had split with his wife.
Three years after the Gattaca co-stars' 2005 divorce was final, the Boyhood actor wed his so-called mistress and they now have two daughters of their own.
'I met Ryan through my literary agent, and she was indeed one of Maya and Levon's nannies during a film shoot,' Ethan told the British newspaper.
'After a short period of working for me, Ryan went back to Columbia to get her degree. There were never any scandalous thoughts or actions back then. In the years that followed, my marriage disintegrated due to many pressures, none of which were remotely connected to Ryan.'
The late, great Robin Williams was said to have allegedly cheated on his first wife Valerie Velardi in 1988 with their son Zak's nanny Marsha Garces.
Shortly after divorcing Valerie, the Oscar winner - who committed suicide last August - was married to Marsha for 21 years and they had two children before divorcing in 2010.
Ten years ago, Jude Law famously issued a public apology to his then fiancée Sienna Miller for having an affair with his three children's 26-year-old caregiver Daisy Wright.
'Following the reports in today's papers, I just want to say I am deeply ashamed and upset that I've hurt Sienna and the people most close to us,' Law said in a statement to the British Press Association.
'I want to publicly apologize to Sienna and our respective families for the pain that I have caused.
'There is no defense for my actions which I sincerely regret and I ask that you respect our privacy at this very difficult time.'
Around that same time, the British actress had also been allegedly canoodling with her Layer Cake co-star Daniel Craig.