Matt Hancock is set to face fresh questions over whether he was "sh**ging on taxpayer cash" amid claims he took his mistress to the G7 health summit.
The former Health Secretary, who sensationally stepped down last night after The Sun exposed his romance with Gina Coladangelo, reportedly took the aide with him to Oxford.
It's not known if the pair stayed together.
However, Hancock slept at a luxury hotel, all paid for by Brits, in the city where he and his lover first met at university students two decades ago.
It's understood the Prime Minister had no idea of claims his minister had invited married Mrs Coladangelo to the city on June 3 and 4, the Sunday Times reports.
Hancock - dubbed "puritan-in-chief" for his militant stance on couples from separate households meeting up during lockdown - reportedly told Martha, his wife of 15 years, he would be leaving her on Thursday.
He apparently sat the mother of his three children down hours before this paper printed images of his clinch with Mrs Coladangelo.
And he initially appeared grimly determined to cling onto his job, despite the fury of millions of Brits who complied with his coronavirus
laws to the letter.
But last night, Hancock bowed to public pressure - and announced he will step down from the role, despite the PM's backing.
Shockwaves from the affair, which he claims began in May, continue to ring out today.
And it's now been reported that senior Government figures have raised concerns that the couple pursued their liaison at public expense.
Two sources say that Mrs Coladangelo accompanied him to a meeting of G7 health ministers earlier this month, an event that involved a dinner and an overnight stay.
There is no evidence the pair stayed in the same room, although the event was four weeks after their now-notorious kiss, which happened as he ordered Brits not to hug their loved ones.
One cabinet source told the paper: “She went with him to the G7 health ministers’ summit.
"Did he disclose this to the PM? If it was shown he was sh**ging on the taxpayer he had to go.
"He’s been puritan-in-chief in the Government and now it turns out he’s a massive, lying hypocrite.”
Hancock groped his mistress at work on May 6 - while millions went without seeing or touching their loved ones.
And while he reportedly told Boris Johnson
the affair began that month, it's claimed Mrs Coladangelo was confronted over a possible romance with him two years ago.
The ex Health Secretary's lover was 'gently questioned' back in 2019, but insisted nothing was going on, according to reports.
The pair are understood to be hoping to make a life together, with allies insisting it's "more than a fling" and Hancock is "serious" about it.
One friend has revealed: "Matt and Gina are in love" - and while the relationship started just last month, "it is serious.”
Mrs Coladangelo is married to millionaire entrepreneur Oliver Tress, 54, who founded the High Street fashion and lifestyle chain Oliver Bonas.
They live in a £4million, six-bedroom Edwardian home.
It's understood he's been left devastated - and his wife was pictured packing up her car after she was told her affair would be exposed.
A friend of Mr Tress told the Mail on Sunday: "I imagine he is just falling apart over this.
"He had no idea that this was happening. He trusted them both."
Meanwhile, Martha, who has maintained a dignified silence, has been seen out wearing her wedding ring since the scandal broke.
Former Chancellor and Home Secretary Sajid Javid will replace Matt Hancock as Health Secretary, Downing Street announced.
He smiled as he greeted press outside his home this morning, and told reporters: "I think Matt Hancock worked incredibly hard, he achieved a lot, and I'm sure he will have more to offer in public life.
"I was honoured to take up his position. I also know it comes with huge responsibility and I will do everything I can to make sure I deliver for the people of this great country."