BECKHAM THE ULTIMATE BETRAYAL: He put his hand down my bikini bottoms

DAVID Beckham has been cheating on pregnant wife Victoria with one of her close friends.

The England soccer captain pursued 22-year-old beauty therapist Dannielle Heath before seducing her behind Victoria's back.

Dannielle, who bears an astonishing resemblance to Posh, tells today how Beckham is a calculating predator who ruthlessly seduced her despite his wife's condition.

Her astonishing story explodes the show of unity carefully orchestrated by the Beckhams since Rebecca Loos told of her affair with the Real Madrid star.

It exposes Beckham as reckless philanderer who first came on to star-struck Dannielle only weeks after the Loos scandal. Then he had sex with her after he and Victoria jubilantly announced she was expecting their third child, declaring: "This is fantastic news and we are both absolutely delighted."

Dannielle became a regular visitor to Beckingham Palace, the Beckhams' Hertfordshire mansion, after meeting Victoria in an Essex beauty salon. She would give Victoria waxing treatments and apply spray-on fake tan to her husband.

Here, in an exclusive interview with the Sunday Mirror, Dannielle tells how Beckham:

-First began flirting with her at the marital home while Victoria was away on a charity mission in Peru in May.

-Smeared Body Shop Body Butter over her, keeps his testicles shaven and fantasies about getting his private parts waxed.

-Admitted he felt guilty cheating on Victoria - but couldn't help himself.

-Romped with her in Madrid while Victoria was back in Britain for their son Romeo's second birthday party.

Dannielle's first experience of "Planet Beckham" was in March when Victoria popped into a tanning salon in Old Harlow, Essex, run by one of Dannielle's friends, and the pair began chatting about beauty regimes. Dannielle said: "Victoria was having a sunbed treatment and commented on how brown I was. I couldn't believe how friendly she was. I told her about my self-tanning system and explained I owned a salon myself over the road. I gave Victoria my number but didn't expect her to call.

"But the next day she rang for a facial. I was so surprised that she got in touch. She came in the next day and we chatted about beauty. A couple of weeks later she came in for a bikini, underarm and leg wax.

"I couldn't believe it. Here was the most famous woman in Britain treating me like a trusted friend. I was so flattered."

Soon afterwards Posh sent her nanny to Dannielle's salon to test out the self-tanning system. The nanny then made an appointment for Dannielle to tan Posh at home.

Little did anyone know that weekend in April would be the one where the world would learn of Beckham's affair with his PA Rebecca Loos. Shocked Dannielle did not know whether to keep her appointment with her first-ever famous client. "But when I got there you would never believe there was anything wrong. They were kissing and getting on well. They seemed so calm.

"David was wearing three-quarter length shorts and a baggy t- shirt. I didn't fancy him but was struck by how he looks into your eyes when he speaks to you."

The couple were getting ready to go to a birthday party thrown by their agents, 19 Management, at the Albert Hall. It was their first public appearance since the Loos scandal broke.

Over the next few weeks she became a regular visitor to Beckingham Palace.

In May, when Victoria was in Peru, Beckham seized his opportunity to be alone with Dannielle. "He got a member of his staff to call me to wax and tan him," says Dannielle. "When I got there David was picking Brooklyn up from school. He handed Brooklyn over to the nanny and we were alone. I asked him where he wanted treating, expecting to do his chest and back, but he pointed down and said, 'The groin area'. I have never been asked to do that before and I told him if he wanted to be waxed, I would have to do it before the tanning otherwise it would pull the tan off. But he decided against it in the end."

Beckham then led Dannielle upstairs for the tan treatment. He stripped down to his pants and Dannielle soon noticed he was in a flirty mood. "He kept complimenting me on losing weight," she recalls. "He asked about my boyfriends. I told him I had just split up with someone and he told me, 'Everything happens for a reason'.

"He asked me if the tan was ready. I replied, 'Is it tacky still?' He then said, 'Can you feel?' I felt his arm and wondered if he was coming on to me. Then I thought it would be ridiculous to think that David Beckham fancied a girl like me. Besides which I liked Victoria and considered her a friend. When I told a friend afterwards they said, 'He fancies you', but I didn't know what to think."

In August Victoria finally joined Beckham in Madrid - and Dannielle was there to say goodbye. A few days later she was invited to visit her clients in their new rented home in the Spanish capital. Dannielle says: "Posh and Becks liked my work and trusted me. Victoria said she didn't want anyone else."