In a much anticipated - and wildly expensive - interview, the woman who claims she had an affair with David Beckham has revealed a barrage of sexual detail on television.

Beckham's former personal assistant, Rebecca Loos, told Sky One's Kay Burley that the Real Madrid midfielder was an "amazing lover" and the pair "couldn't keep their hands off each other" in the bedroom.

She said she had been "besotted" by him and was hurt when the affair ended.

The interview has reportedly netted Loos £150,000 ($397,000). News of the World has also paid £350,000 ($927,000) for a three-week serialisation of her story.

David and Victoria Beckham have already described the claims as "absurd", "ludicrous" and "unsubstantiated". Beckham's lawyers attempted to block the interview, but Sky refused to drop it.

In the Sky One interview, Loos insisted she was telling the truth. She detailed their alleged first night of passion following an outing at a Madrid nightclub. The pair were drawn together "like magnets".

She said: "We were just locked into each other all night conversation-wise, other people noticed ... we just connected.

"I think the chemistry between David and I was so strong ... people were aware and they weren't very happy."

In the club she said he had whispered words to the effect of: "Why don't we just lose the rest and go back [to the hotel] together?"

Loos, 26, told Burley: "A bit later on it dawned on me what he had asked me, and I did want to go back with him."

Loos said they started kissing passionately in a chauffeur-driven car on the way back to the football star's hotel room on September 18 last year.

Loos said the married father-of-two was an "amazing", "generous" and "giving" lover.

"He knows how to please. He's not afraid of a woman's body. He seems to know what he's doing," she said.

In the morning she said he fed her fresh fruit and left her "feeling like a million dollars".

She left the hotel "breathless".

In the interview she said the pair had slept together fewer than six times but he left her "very satisfied" every time.

But she said their final sexual encounters were more about sex than love.

"It started off tenderly and became much more sexual towards the end," she said.

"We'd only ever talk about sex. I went to visit him at his hotel room before a match and I was very excited to see him.