Lorraine Kelly criticised Jennifer Arcuri live on air, asking "what's the point of you coming on TV?" after the US businesswoman appeared to dodge questions on Good Morning Britain.
Ms Arcuri swerved queries about her relationship with Boris Johnson, telling hosts Piers Morgan and Susanna Reid that she did not want to "be pressured into admitting" to anything about her links to the Prime Minister.
During a live link-up following the interview, Kelly told Morgan and Reid: "That was crazy wasn't it? What's the point, coming on and not answering any questions?"
Morgan asked Ms Arcuri if she had a response to Kelly, who repeated directly to her: "It just doesn't make any sense. What's the point in you coming on and not saying anything?"
Seemingly taken aback, Ms Arcuri asked: "I'm sorry?"
Kelly said: "What is the point of you coming on TV to clear the air and then you don't say anything?"
Ms Arcuri replied: "I believe I said a few things. What is it that you're looking for that I should say?"
Kelly responded: "You didn't answer any of the questions that were put to you, and I just don't see the point of you coming on to be honest."
Ms Arcuri has been at the centre of a controversy involving Mr Johnson, and in an interview with ITV Exposure that aired on Sunday she said she wished she had declared their personal relationship as a potential conflict of interest to avoid her "humiliation".
Ms Arcuri claimed Mr Johnson cast her aside as though she was a "gremlin" after she tried to contact him for advice on how to handle the media interest.
The Duchess of York, left, during an interview with GMTV presenter Lorraine Kelly.
Lorraine kelly welcomed back to GMTV by the breaskfast channel's Mr Motivator. Lorraine will return in the new year to present her own programme between 8.45-9.25.
PA NEWS PHOTO 13/1/95 TV PRESENTER ULRIKA JONSSON (LEFT) WITH HER THREE-MONTH OLD SON CAMERON AND LORRAINE KELLY WITH HER SEVEN-MONTH OLD DAUGHTER ROSY AT THE LAUNCH OF TOMMY'S PARENT FRIENDLY AWARDS SUPPORTED BY KLEENEX/HUGGIES NAPPIES IN LONDON
PAP 12: LONDON: 05.05.95: GMTV presenters, (l/r) weathergirl Sally Meen, Mr Motivator and Lorraine Kelly, dressed in 1940's costume, as they start VE Day celebrations in London today (Friday). Photo by Justin Williams/PA. gm.
GMTV PRESENTERS FIONA
PHILLIPS (l) EAMONN HOLMES (2nd l) and Lorraine Kelly (r) AT THE LAUNCH OF THEIR NEW
MONTHLY MAGAZINE IN LONDON. THE
MAGAZINE WILL OFFER READERS THE CHANCE
TO LEARN MORE ABOUT THEIR FAVOURITE TV
LORRAINE KELLY AND ANTHEA TURNER ARRIVING AT THE GROSVENOR HOUSE HOTEL IN LONDON'S PARK LANE HOTEL FOR THE ROYAL TELEVISION SOCIETY AWARDS
PA NEWS PHOTO 9/10/97 TV Presenter Lorraine Kelly with her daughter attend the movie premiere of "Hercules" at the Odeon, Leicester Square, London
Actress Patsy Palmer (L) and GMTV presenter Lorraine Kelly at GMTV. It was announced 8/9/99 that Patsy, who plays Bianca in the BBC soap Eastenders will stand in for Lorraine for a week in October, and host the Lorraine Live section of the show from Miami. * Palmer will be seen on Lorraine Live from 9am to 9.25am each day from Monday October 18 to Friday October 22.
TV presenters Lorraine Kelly (L) and Carol Vorderman at a reception for the British broadcasting industry at Buckingham Palace.
Sarah Ferguson (R) took part in Lorraine Kelly's (L) early morning breakfast show on GMTV, Wednesday 12 December 2001. She spoke about her charity 'Children in Crisis' and its work in Afghanistan.
GMTV weather presenter Andrea McLean (left) with her 11-week-old son Finlay and GMTV presenter Lorraine Kelly after appearing on the show in London.
GMTV Presenter Lorraine Kelly (centre) is joined by her fitness guru colleague Nicky Waterman (right) and the founder of Playtex Moonwalk, Nina Barough. * They are in front of some of the women who on Saturday will take part in the Playtex Moonwalk to help in the fight against breast cancer. Over 10,000 women, and a few men, from all across the UK will gather at Battersea Park in London to take part in the Playtex Moonwalk, the only power-walking marathon in the world. The event began five years ago with 65 power walkers and has since raised in the region of 3 million for breast cancer research and care.
GMTV presenters with their award at the TV Quick Awards at the Dorchester Hotel in London. (L-R) Fiona Phillips, Andrea McLean, Andrew Castle, Richard Arnold (on floor), Lorraine Kelly Penny Smith, and Kate Garraway.
TV presenter Lorraine Kelly stops for refreshments with the Dundee University women's rugby squad during her carriage ride through the streets of the City, as she is installed as a rector of the university. The Glasgow-born GMTV presenter beat BBC Radio Scotland presenter Lesley Riddoch and the disgraced former MI5 agent David Shayler in February to the become the rector.
Lorraine Kelly and Avril Lavigne pictured during recording for the Charlotte Church Show series 2, Channel 4, on March 21, 2007. Transmission date: Friday March 23, 2007. 22.00 hours, Channel 4.
Lorraine Kelly and daughter Rosie arrive at the Bafta Scotland Awards ceremony at the City Halls in Glasgow.
Lorraine Kelly, in a tank, launches Armed Forces Day at the Redford Barracks, Edinburgh.
Television presenter and honorary Black Watch colonel Lorraine Kelly laughs as she inspects officer duties at the Royal Gun salute to mark the Queen's birthday at Stirling Castle in Scotland.
Lorraine Kelly, Alexa Chung, Miles Kane, Agyness Deyn, Little Boots, Estelle in the front row at the House Of Holland Spring/Summer '10 catwalk show during London Fashion Week at the Guildhall in London.
TV presenter Lorraine Kelly stops the traffic at the Abbey Road pedestrian crossing, in London, during the launch of the Lollipop Person of the Year Awards 2009.
Lorraine Kelly is seen at the start of the 2010 London Marathon, at Blackheath in south London.
TV presenter Lorraine Kelly rides in a tank as she helps to promote Armed Forces Day, she set off from RAF Leuchars in Fife, flying by Royal Navy helicopter to Scotstoun shipyard in Glasgow.
TV presenter Lorraine Kelly (right) meets Deputy First Minister of Scotland Nicola Sturgeon as she helps to promote Armed Forces Day, she set off from RAF Leuchars in Fife, flying by Royal Navy helicopter to Scotstoun shipyard in Glasgow.
Lorraine Kelly poses in a cutout of a television screen, in Edinburgh, to mark the start of the six month countdown to the digital switchover for viewers in central Scotland.
EDITORIAL USE ONLY. TO BE USED ONLY IN CONJUNCTION WITH THE STORY
Handout photo issued by Comic Relief of Lorraine Kelly during the first day of a celebrity trek for Comic Relief.
EDITORIAL USE ONLY. TO BE USED ONLY IN CONJUNCTION WITH THE STORY Handout photo issued by Comic Relief of Lorraine Kelly, comforted by Scott Mills as she cries after hearing a message from home live on Radio 1 on the last morning of the trek on day 5 of the BT Red Nose Desert Trek for Comic Relief in the Kaisut desert, Kenya.
Craig Revel Horwood and Lorraine Kelly attend the opening night of Northern Ballet's Cleopatra at Sadler's Wells, London, 17th May 2011.
Lorraine Kelly and Kirstie Allsopp in the B&Q Garden, the tallest edible garden at the Chelsea Flower Show.
Lorraine Kelly plays tennis during the Lawn Tennis Association's campagne All Play, at Wimbledon Park Tennis Courts, Wimbledon.
Lorraine Kelly and Nicola Roberts attending the House of Holland fashion show, held at the Dairy venue as part of London Fashion Week.
Lulu (right), winner of the 'Lifetime Achievement Award' at this year's Women of the Years awards with Lorraine Kelly at the ceremony in London today.
Lorraine Kelly launches the uk4u Thanks! 2011 Christmas Box campaign at the Tower of London in London, by firing the the Honourable Artillery Company Gun along side troops.
TV presenter Lorraine Kelly with her daughter Rosie after she was awarded an OBE by Queen Elizabeth II for services to charity and armed forces at a ceremony at The Palace of Holyroodhouse in Edinburgh.
Ali Hall, Kelly Brook, Lorraine Kelly and Mark Heyes arriving at Lorraine's High Street Fashion Wards, at West Wintergarden in Canary Wharf, London.
Lorraine Kelly launches the 2013 Christmas Box campaign for the military charity uk4u and then leads a 15-strong colourful Company of Pikemen & Musketeers, complete with Drumbeater and a Fifer from Bunhill Row to Armoury House, home to the Hounourable Artillery Company.
Lorraine Kelly attending the opening night of I Can't Sing! The X Factor Musical
Lorraine Kelly in the stands
Lorraine Kelly and daughter Rosie arrive for the British Academy Scotland Awards held at the Radisson Hotel in Glasgow.
Lorraine Kelly and daughter Rosie attending Lorraine's High Street Fashion Awards, at the Connaught Rooms in London
Lorraine Kelly and daughter Rosie attending the Minions UK Film Premiere held at the Odeon cinema Leicester Square, London
(Mandatory Credit: DOUG PETERS/ EMPICS Entertainment)
Lorraine Kelly attending the National Television Awards 2016 at the O2 Arena, London.
Copyright Doug Peters EMPICS Entertainment
TV presenter Lorraine Kelly with her daughter Rosie Smith, after she graduated from Edinburgh Napier university with a journalism degree.
Maajid Nawaz and Lorraine Kelly receive a Pink News Broadcast Award during the the PinkNews awards dinner at One Great George Street in London.
Lorraine Kelly (left) and Rosie Smith attending An Evening with Chickenshed at the ITV Studios at Southbank in London. Picture date: Tuesday April 17, 2018. Photo credit should read: Ian West/PA Wire
Lorraine Kelly attends ITV Palooza!, Royal Festival Hall, Southbank, London.
Lorraine Kelly attending the 2019 Royal Television Society Programme Awards, held at the Grosvenor Hotel, London. Photo credit should read: Doug Peters/EMPICS
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Her links with Mr Johnson came under public scrutiny earlier this year over allegations she received favourable treatment for her business ventures during his eight-year stint as mayor of London.
The show alleges the pair were involved in an affair for more than four years.
In the interview with Good Morning Britain on Monday, Ms Arcuri was asked if she had had an affair with Mr Johnson after using the word in the documentary.
She said: "I'm not going to answer that question, but as you can tell, there was a very special relationship there.
"When it did come out, half the people already assumed the affair and told me to admit it. The other half wanted me to deny, deny, deny."
She added that she can "concede to the fact that I have been heartbroken".