Matt Hancock's former aide Gina Coladangelo has left her husband to be with the ex-Health Secretary, reports claim.
The pair are said to have moved in together after their romance was exposed and Mr Hancock resigned.
He faced pressure to quit after the pair were caught kissing in his office at the Department of Health.
He apologised after being branded a "hypocrite" for breaking social distancing guidance while ordering Brits to respect the Covid lockdown.
The Health Secretary "directly" handed uni pal Ms Coladangelo a £15,000-a-year taxpayer-funded post at the Department of Health last year, No10 have confirmed.
Reports claim Mr Hancock, 42, has since left his wife and mother of his three children, Martha Hancock, 44, for his new lover.
According to The Sun, Ms Colandangelo, 43, who was hired using taxpayers' money, has now also left her husband, the millionaire fashion boss Oliver Tress, 54.
The former aide and non-executive director at the Department of Health has now reportedly moved in with Mr Hancock after ending her 12-year marriage to her Oliver Bonas founder spouse.
She was pictured on Friday piling her £70,000 Audi Q7's boot high with bags before driving away from the £3.6million home in Wandsworth, south west London, she shared with the father of her three children.
According to the newspaper, Mr Tress is said to be “devastated” by the revelations of her affair as family friends confirmed the couple's split.
A neighbour said: “Gina and Matt are giving it a proper go and Olly was left reeling.
“They had lots of friends here so we are all trying to help look after Olly."
According to the Mail on Sunday, Mr Hancock told a close pal he was "in love" with Ms Coladangelo and described the relationship as "serious".
Security reviews have been launched in Westminster after the leak of the footage from his former office.
Ministers have publicly expressed surprise at the presence of CCTV in the office and new Health Secretary Sajid Javid said it had since been disabled.
Downing Street has said Boris Johnson did not sack Matt Hancock as Health Secretary, or urge him to quit over the scandal, shortly after the Prime Minister bafflingly appeared to try to claim credit for the resignation.
Labour accused Mr Johnson of "trying to rewrite history" by indicating on Monday he acted over concerns that Mr Hancock undermined the coronavirus messaging by breaching guidelines.
On Friday, No 10 has said that Mr Johnson considered "the matter closed" as he supported Mr Hancock through the scandal.
Downing Street has since said the pair held talks on Saturday and, having "discussed it further", Mr Johnson backtracked to agree that Mr Hancock had to stand down.
During a by-election campaign visit to Batley, Mr Johnson suggested he acted over Mr Hancock's affair because it undermined the Government's message that the nation has been in the pandemic together.
"That's right," Mr Johnson told broadcasters. "And that's why when I saw the story on Friday we had a new Secretary of State for Health in on Saturday."
Labour deputy leader Angela Rayner accused Mr Johnson of trying to take credit for the resignation and said that "serious unanswered questions" remained.
"Boris Johnson is trying to rewrite history because he didn't have the guts to sack Matt Hancock," Ms Rayner said.
Asked if Mr Johnson sacked Mr Hancock, the PM's official confirmed the former Health Secretary had resigned himself.
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