By Ekin Karasin and Ryan Parry.
Mel B's ex-nanny has claimed the former Spice Girl acted as 'cameraman' to film their alleged threesomes with her estranged husband Stephen Belafonte.
Lorraine Gilles, 26, alleged that she had sex 'multiple times a week' with the 42-year-old singer and felt 'very uncomfortable' about being filmed romping with the couple according to DailyMail.
The married German babysitter made the explosive claims in a 128-page libel lawsuit that hit back at Mel's allegations that Lorraine had an affair with Stephen behind her back and aborted his baby.
Lorraine claimed that the couple have footage of their threesomes on their mobiles and that she is petrified they will be leaked online.
'These recordings would be extremely embarrassing to me and my family... I do not want any of them to become public,' she wrote in the lawsuit.
In the dossier filed by her legal team with California's Superior Court on Friday, Gilles hit back after Mel portrayed her as a 'homewrecker'.
Mel, who filed for divorce from Stephen after 10 years of marriage in March, has alleged that Lorraine fell pregnant by her husband and then had an abortion - but Lorraine denies that the baby was his.
The America's Got Talent judge also accused music producer Belafonte, 42, and Lorraine of taking money from her.
Hitting back, Lorraine said in the papers: 'My sexual and employment relationship with Melanie continued for approximately seven years until September 2016.
'During my time with Melanie, she and I had sex sporadically, sometimes having sex multiple times in a week.'
'On the other hand I never had any sexual relations with Stephen without Melanie's instruction and without ¬Melanie's actual or apparent consent. At no point did I represent to Melanie that I was pregnant with Stephen's child.'
'The only times Stephen and I had sex was when Melanie instructed Stephen and I to do so. Or when Melanie herself invited her husband to join us in the bedroom, at which point Melanie would often serve as the 'camera man' and record the sexual encounter or take part in the menage a trois herself.'
Gilles admitted she told Mel B she was excited to share a sex act with the singer at the weekend, adding in the explicit email: 'It has been too long!'
Lorraine, who arrived in California from her native Germany in 2009 when she was 18, met Mel B and Stephen at a West Hollywood restaurant when she spoke little English.
She claims Mel B invited her back to their home within days of meeting, where they had booze-filled 'consensual group sex together'.
She alleged that after she returned to Germany six months later, Mel offered her a $6,666-a-month job as a nanny for her three daughters Madison, Angel and Phoenix.
Lorraine claimed Mel B told authorities that she was 'a full-time caregiver for her children' and helped her get a US visa.
She was fired in September 2016 after getting 'caught in the middle of intensifying marital arguments between the couple,' and handed a $300,000 severance package, the documents alleged.
Lorraine also slammed Mel B's claims that she aborted Stephen's baby - which she says came from a one-night stand with a stranger. Gilles even claimed Mel B paid for the termination.
'Stephen and I never told Melanie I was pregnant with Stephen's child in 2014, as is stated in Melanie's declaration,' she said in the papers.
'Rather, I discovered I was pregnant several weeks after I went out for drinks with a friend at The Den in West Hollywood and had a one-night stand with a man I met at the bar. I immediately sought guidance from Melanie and spoke to her privately about the pregnancy. I felt comfortable approaching her because of our close relationship.
'At no point did I suggest or imply that I believed Stephen to be the potential father of the child. In fact, I had not had group sex with Stephen for several months prior to my unexpected pregnancy. Instead, Melanie herself assisted me with arranging a medical appointment, advanced the cash for the procedure, and booked a hotel for me to stay in to recover.'
'On several occasions, Melanie actually visited me in the hotel and brought her children to make my recovery more pleasant.'
As part of the original court order against Gilles - in what's now become a bitter legal tussle - Mel was granted access to a storage locker rented in Gilles' name.
She claimed the locker contains alleged sex tapes and private photos Gilles and Belafonte could make public, as well as Spice Girls memorabilia and photos of her late father, who died in March.
But Lorraine, who is now working as a waitress, denied the claims that she is holding tapes and photos in storage - adding that the locker is in fact in Mel B's name.
Gilles, who has been at the centre of the explosive divorce case for months, also claimed she was sent death threats by online trolls.
'I have been actively trying to move past my time and relationship with Melanie. I simply wish that she shows me the same respect I've shown her over the past seven years,' she wrote in the documents.
'However this lawsuit became necessary after she refused to leave me alone and spread a number of lies about me and my relationship to her family on an international scale, all to benefit herself in her divorce proceedings.'
Talking about vile trolls, she said in the dossier: 'I have received countless messages, threats and insults from random persons all over the world, shaming and degrading me based on the false image of me created by Melanie.'
Lorraine claims she was portrayed as a 'conniving and backstabbing homewrecker who has extorted mass sums of money from Melanie' in the divorce case.
She said people were now 'viewing me as an 'evil woman' based on the statements made by Melanie', in the papers.
Elsewhere in the shocking dossier, Lorraine claimed Belafonte paid $60,000 to her husband Michael Bleau to help his start-up business and not as a pay-off.
She also alleged that in late 2014, Mel B took 'an entire bottle of aspirin' and was hospitalised while filming the last stages of The X Factor in the UK.
Mel B previously said their relationship ended on bad terms - but Gilles refuted this and said she was invited to Mel's daughter's pre-school event after being sacked.
Lorraine detailed how Mel B apologised in a note to her. She said one of the singer's daughter gave her a handwritten message that read: 'I write this to say not only thank you for everything you have done for my kids, but also sorry.'
Her claims come after she ducked out of a seven hour 'tell-all' deposition with the former Spice Girl's lawyers, claiming she was unwell, DailyMail.com can reveal.
Lorraine was due to sit down with Mel's attorneys last week in her divorce case but cited illness for her no show.
In April, Mel was granted a restraining order against Gilles who was ordered by a judge not to harass the singer and to stay 100 yards away from her.