LUSTY News of the World sex columnist Anvar Khan has told how she had a kinky fling with a married Scots politician.

The busty 37-year-old revealed how the mystery MSP liked to be SPANKED, enjoyed ROMPING at swingers' parties and even asked her to arrange a THREESOME.

Last night she giggled: "It wasn't the best shag I've ever had - I think I was supposed to be more impressed with his status than his performance." Telly sexpert Anvar reveals sizzling details of the affair in her new X-rated diary-style autobiography, Pretty Wild - but doesn't name the MSP. Debate will be raging at Holyrood about the identity of the philandering politician, who cannot be named for legal reasons. But today, Glaswegian Anvar reveals more details about their sensational affair. She says: "I met him in a bar in Edinburgh in May 2001. He took my number and called me a month later to ask me to dinner. He struck me as being really up-front and really full-on - he was still wearing his wedding ring which was pretty brazen. But he told me his wife didn't understand his hours and that his marriage was a sham. Two weeks later, he called me again and we arranged to go out for dinner in Glasgow.

He came to my flat for drinks - but we didn't make the restaurant. Instead, we got very drunk and then he came on to me. I was single at the time so I was quite up for some no-strings passion. The kissing wasn't great because he had very very bad breath so we fooled around and had the worst kind of drunk sex you could ever have. While he was lying on my bed afterwards he spotted a pair of red PVC gloves. He asked me to put them on and then begged me to give him a spanking.

Kinky

I did it, though I was creasing myself laughing. But he was quite into it. I got the impression it was something he had done a few times before. Then he said that he felt he could be frank with me and confessed he'd always fancied a threesome. He asked if I had any female friends who would want to join in. He said that he would have to trust them - like he trusted me - not to say anything to the papers. I laughed because I thought it was hilarious.

I was shocked that he was being so open. Anvar didn't hear from the MSP, referred to in her book as "Patrick" until he called out of the blue in August, 2001. By then, she'd moved to London and he offered to visit. But the real reason for his call was revealed when he asked if she'd been in touch with any of her pals about a threesome. He then rang back a month later with another kinky suggestion for her. Anvar told us: "He asked if I wanted to go with him to a swingers' party at a club in Manchester called Cupids. He had obviously been before. He turned up with a couple of friends, Drew and Jerry, and a woman, Hilda, who I'd never seen before and who was definitely NOT his wife.

Naked

I dozed off shortly after we set off on the drive from London to Manchester and woke up to see Jerry reaching over to the passenger seat to massage Hilda's breasts. At the same time she was performing a sex act on Patrick as he drove.

When we got to Cupids, the place was crawling with middle-aged couples openly having sex while others watched. I saw a fat, bespectacled woman lying naked on a bed in the corner of the main bar, with one man stroking and kissing her nipples, another snogging her, a third performing a sex act on her and a fourth looking for something to do. Everyone was naked or wearing just skimpy underwear. Guys were walking up to women and asking to grope them as their hubbies looked on. Drew swigged juice laced with liquid ecstasy and began behaving like a maniac. He ended up having sex with a 75-year-old pensioner. But I stayed in the background and didn't join in. I was talking to people rather than doing anything. It was all so seedy.

I bumped into my politician friend and his mates later as they had their way with two women in a private room. But I kept an eye on him - he went off and had sex with at least three other women. After I got back to London, I didn't see him again. But he called me up 18 months ago. He told me he'd only phoned to say hello and to see how I was getting on. But I think he was panicking because I'd started my News of the World column and he was worried I'd spill the beans.