The former Spice Girl, 40, has reportedly been secretly dating a policeman for the last few months, following her bitter separation from husband Stephen Belafonte.
'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.
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.
She claims Mel B invited her back to their home within days of meeting, where they had booze-filled 'consensual group sex together'.