The former Spice Girls singer claimed her estranged spouse stole her phone and texted the 56-year-old comedian's assistant at 4:30am, pretending to be her.
Gilles claims Mel B told lies about her in the divorce case against Stephen Belafonte.
The nanny, Lorraine Gilles claimed in her lawsuit against the former Spice Girl, that she often had threesomes with her and her husband, Stephen Belafonte during a period of 7 years, The Sun reports.
In the documents, Lorraine - who worked for the couple in 2009 - confirmed that she did have an abortion in 2014 but said she fell pregnant following a one-night stand, and the child was not Stephen's.
According to all parties involved, Mel and Belafonte regularly engaged in threesomes with Gilles, and there are rumors that she appears in the couple's sex tape, which is now in Stephen's possession.
Mel B also claimed that after she fired Giles in January 2015, Belafonte threatened to release the sex videos unless she rehired the childminder with a raise.
There are numerous exhibits and pictures in the lawsuit which Gilles believe will convince a jury all Mel B's allegations against her are lies.
Mel B, whose full name is Melanie Brown, is now a judge on America's Got Talent, and Wednesday film producer Mr Belafonte in June 2007.
Mel had previously asked for sole legal and physical custody in her restraining order against Belafonte.
In her response to these claims, Miss Gilles says she was wrongly branded a "homewrecker, prostitute and extortionist".
"Moreover, given Brown's celebrity status, Brown was aware or should have been aware that the declaration would be publicized and made available to the public at large", Gilles adds. One reads, "I Love You", while others include, "Daddy Where are you", followed by an emoji of a crying face, both of which Stephen couldn't respond to because of the restraining order.
Gilles also denied Brown's accusation that she was impregnated by Belafonte.
The nanny insists that she never had sex with Stephen without Mel present, and was never pregnant with his child.
However the mother-of-three has reportedly refused his request, and instead accuses Stephen of owing her £800,000 - a claim he vehemently denies.
Lorraine is suing the America's Got Talent judge for defamation, libel, invasion of privacy, and infliction of personal distress, according to documents obtained by E!
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