Britain's most prolific mistress Gweneth Lee was involved in a TV bust-up with presenters Phillip Schofield and Holly Willoughby on ITV1's This Morning today. Gweneth, 47, who has had affairs with 100 married men, clashed with the hosts over her claims that sleeping with women's husbands can save their marriages.

Gwyneth Lee

Gwyneth Lee

Viewers reacted with fury to her appearance on the ITV1 show, saying she was 'deluded', a 'home wrecker' and an 'auld slapper.'

Gweneth meets her lovers on, the UK's leading dating website for married people. Businesswoman Gweneth, of Chelsea, West London, laughed as Phil asked her: "So is this a job or just a high sex drive?"

Gweneth said: "It's not as high a sex drive as it seems - married men don't have that much free time anyway. They have their lives, their business and their families. If they have no sex life at home, it is not like they are having a replacement with me. I will maybe only be seeing them four times a year. It's not like the sheets are flying six times a day."

Gweneth's affairs started 12 years ago when her oil executive husband Robert died from cancer, but she had enjoyed an open relationship with him in the last years of the marriage when they were both cheating.

She said: "We had one of those don't ask, don't tell marriages and as long as it is all doing respectfully it works. I knew I was not marrying a saint. I was his fourth wife."

Holly then asked: "You believe that monogamy does not really work?"

Gweneth replied: "I think it works for some people - it is highly over-rated. You marry because you have your best friend, your team-mate in life. Having an affair is nothing more than sex and somebody should keep their wits about them if they are having an affair. If you are going to be stupid and fall in love and destroy your home life, then you are an idiot. I think an affair is nothing more than a physical action."

Holly asked: "Do have to stop yourself from getting emotionally attached because that naturally happens?"

Gweneth accepted she got emotionally attached and Holly added: "That's more than sex then."

Phil read out a quote of Gweneth's that she had 'loved a lot of them (her married lovers) deeply.'

Phil then asked about the ethics of using - a controversial dating website specifically for married people.

Gweneth said: "I am not out there stealing my friends husbands - this is 100% not what it is about.

"IillicitEncounters was set up for the purpose of helping married people to have an affair. This is someone who has gone on the website because they have not had sex with their spouse for five or ten years. I have met men who have an arrangement with their spouse. They tell me: 'I do this, I have a budget for it, she has gone off sex.'

"You can have a wonderful marriage, great kids - you just don't like sex."

Holly asked: "Do you ever sleep with single men?"

Gweneth said: "I find it a lot easier dating married men. They are more respectful - they treat me better."

Phil then mentioned a married lover Gweneth had on in New York who arranged for her to stay in a hotel 10 miles from his family holiday. He then sneaked out to see her three times, claiming he was going on fishing trips.

Gweneth insisted she did not break-up marriages.

She said: "I make it very clear when I first start dating them that if they are considering separating or divorcing their wives then I am not going to start an affair with them. I don't want to be accountable for that and I don't want to deal with the backlash."

Holly asked: "Do you feel guilty when a marriage ends? You could potentially destroy a family unit - whatever is happening in the parents' bedroom. That must not feel right. There must be a little bit inside you that thinks, 'I must not do this? Children are involved - there is the potential for this to go horribly wrong."

Gweneth said: "I agree with what you are saying but someone who makes a concerted effort to go on a dating website like is going on there for the purpose of having an affair. If it is not me, it is going to someone else. It is their choice."

Phil said: "You also say that you save marriages. Has there been proof? Has someone said, 'Thank goodness for you - you have saved my marriage?'"

Gweneth replied: "More than one man I have been with has said to me that being with you has made my home life so much more relaxed. It has taken the pressure off the wife. He has been with his wife for 25 years - he only has sex on his birthday, Christmas and his wedding anniversary."

Viewers reacted with fury to her appearance.

Ian Griffith said on Twitter: "Why are you giving this auld slapper airtime."

Another viewer Sophie said on Twitter: "Sounds like she loves to be the home wrecker."

Jayne Holmes wrote on Twitter: "What a load of rubbish. I don't see how that woman can save a marriage by sleeping with someone's husband. She is deluded."

Gweneth says she has had more than 100 affairs with married men - some lasting years and others just a few dates.

Most of the men on the site are wealthy businessmen with an average income of £52,000 a year. They are looking for partners just like Gweneth who are glamorous and beautiful and have the same level of sophistication and education they get from their wives. Gweneth jets all over the world meeting middle aged lovers from the site and often has two or three on the go at the same time. She said: "I am happy to go exclusive if the relationship is special to me and I have seen some men on for prolonged periods. "But most of the time I am a free agent and I see more than one man at the same time. They don't mind - as long as I am free when they need me." spokesman Christian Grant said Gweneth was typical of the women on the site which has a 45-55 female/male split. He said:  " provides an outlet for men and women who would have an affair whether we were there or not. In coming to us, they can be assured of meeting a like-minded partner seeking some added excitement in their life who doesn't want to upset things at home." Every week, around 20,000 people in the UK are having affairs on More than one million people have registered with the site since it started in 2003 and the highest proportion of members are wealthy people in London and the Home Counties.

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