Chancellor George Osborne's psychiatrist brother has been struck off the medical register after admitting having an "inappropriate" two-year affair with one of his patients.
Adam Osborne also admitted threatening the mother-of-two when she reported him to the General Medical Council (GMC) after she attempted suicide when he ended the relationship.
The Medical Practitioners Tribunal Service (MPTS) ruled that his fitness to practise was impaired due to misconduct and found that his behaviour was "profoundly unacceptable" .
The doctor, who is five years younger than the Chancellor, was not present at the four-day misconduct hearing in Manchester but did admit he knew - or ought to have known - the woman was a "vulnerable patient" because of her history.
He also admitted sending the threatening emails "in a moment of panic".
The tribunal heard how he had been treating the woman - referred to as Patient A - at a private clinic in London for depression, anxiety and chronic fatigue before he embarked on the affair. She also had a history of substance abuse and self-harm.
They were in an emotional and sexual relationship between 2013 and February 2015 before he broke it off.
She then took an overdose of alcohol and drugs and was admitted to hospital - but not before telling Dr Osborne's supervisor Dr Neil Boast about the affair.
He initially tried to convince Patient A to drop the complaint against him - saying the accusation would "destroy his family" - before becoming "more imploring".
Representing the GMC at the tribunal, barrister Bernadette Baxter described Dr Osborne as "highly manipulative" and said he preyed on the woman's vulnerabilities.
She said: "Patient A said on a number of occasions she wanted him to stop contacting her.
"He sees himself very much as a victim. There are emails where the mood very much changed and spills into the territory where he makes threats towards Patient A, consequences to her family and in fact, the patient seduced him."
This not the first time he has been in trouble with the GMC since he qualified in 2004.
He was suspended from practising for six months in 2010 for prescribing contraceptives to his then girlfriend - now wife - Dr Rahala Noor and anti-psychotic drugs to a cocaine-addicted prostitute with whom he had a relationship and had installed in a £795-a-month rent flat, reportedly so he could have "sex on tap".
Dr Osborne resigned from the private Elitemed Ltc clinic he ran with Dr Noor - who he married in 2012 - last year after the allegations first came to light.
UK news in pictures
UK news in pictures
1/18 23 June 2017
British Prime Minister Theresa May addresses a news conference at the EU summit in Brussels, Belgium, June 23, 2017
2/18 22 June 2017
Cosplay fans (L-R) George Massingham, Abbey Forbes and Karolina Goralik travel by tube dressed in Harry Potter themed costumes, after a visit to one the literary franchise's movie filming locations at Leadenhall Market in London, Britain
3/18 22 June 2017
Racegoers cheer on their horse on Ladies Day at the Royal Ascot horse racing meet, in Ascot, west of London
4/18 21 June 2017
A reveller walks among the tipi tents at the Glastonbury Festival of Music and Performing Arts on Worthy Farm near the village of Pilton in Somerset, South West England
5/18 20 June 2017
A police officer lays some flowers passed over by a member of the public, close to Finsbury Park Mosque in north London, after one man died and eight people were taken to hospital and a person arrested after a rental van struck pedestrian
The Borough Market bell is seen in Borough Market in central London following its re-opening after the June 3 terror attack
Two women embrace in Borough Market, which officially re-opens today following the recent attack, in central London
Mayor of London Sadiq Khan attends the re-opening of Borough market in central London following the June 3 terror attack
People walk through Borough Market in central London following its re-opening after the June 3 terror attack
News Corp CEO Rupert Murdoch, with one of his daughters, visit Borough Market, which officially re-opened today following the recent attack
A woman reacts in front of a wall of messages in Borough Market, which officially re-opened today following the recent attack, in central London
Vivenne Westwood walks the runway at the Vivenne Westwood show during the London Fashion Week Men's June 2017 collections
Millwall fan and London Bridge hero Roy Larner on 'Good Morning Britain'
Richard Arnold, Roy Larner, Piers Morgan and Susanna Reid on 'Good Morning Britain'
15/18 11 June 2017
England players celebrate after defeating Venezuela 1-0 to win the final of the FIFA U-20 World Cup Korea 2017 at Suwon World Cup Stadium in Suwon, South Korea
16/18 11 June 2017
England players celebrate with the trophy after the final match of the FIFA U-20 World Cup 2017 between Venezuela and England at Suwon World Cup Stadium in Suwon, South Korea
17/18 11 June 2017
Great Britain's Alistair Brownlee celebrates winning the Elite Men Columbia Threadneedle World Triathlon Leeds
Danny Lawson/PA Wire
18/18 11 June 2017
Two men drink beer outside the Southwark Tavern which reopened for business today next to an entrance to Borough Market which remains closed in London
Chairman of the tribunal Dr Nigel Callaghan said: "The tribunal does not consider that Dr Osborne's actions are easily remediable. This was not a fleeting relationship but sustained over a period of two years.
"Dr Osborne attempted to persuade Patient A to withdraw the complaint by sending inappropriate emails to her over a 10-day period when he knew she had taken an overdose, and was therefore in a particularly vulnerable and fragile state.
"The tribunal regards Dr Osborne's behaviour as profoundly unacceptable and undermines the public's confidence in the medical profession."
Additional reporting by PAReuse content