David Beckham’s alleged mistress claims she found him in bed with model — while Victoria was on phone

Rebecca Loos is speaking out in a sit-down interview following the release of Netflix’s documentary about David Beckham and Victoria Beckham, which repeated Loos’ 2004 claims that she had an affair with the soccer star.

Loos, who was David’s former personal assistant, now claims that she once found the athlete in bed with another woman during their own alleged affair.

At the time, Loos had allegedly just arrived to the Madrid home of Brazilian striker Ronaldo Nazário in September 2003 when she claims she saw David “hiding at the bottom of the garden” and chatting with a Spanish model.

“That hurt,” Loos, now 46, told the Daily Mail in an interview published on Saturday.

Later that night, however, she allegedly received a phone call from Victoria.

“She’s upset because she’s calling David and he’s not answering. I said I didn’t know where he was… And she says, ‘Don’t hang up, go and find him,’” she alleged.

“I was like ‘Okay…’ ‘So it’s a bit awkward. I went into the house and up the stairs and I saw David’s two bodyguards outside a door.” When she whispered to one of the bodyguards that “It’s Victoria” on the phone, the bodyguard went to get him.

“He [one of the bodyguards] disappears,” she claimed. “When he comes back David is with him. I can see the model in the background lying on the bed. I can see it’s a bedroom. I was fuming and I just looked at him, gave him the phone and said ‘Your wife.’”

She went on: “I was so hurt. It was just this awful feeling and I thought to myself, ‘You stupid fool’ But he had me, he had his claws into me, and I was at his beck and call.”

The Post reached out to Beckham for comment.

Loos, who also claims she sent “very naughty” texts to David in the past, initially reacted to David and Victoria’s Netflix doc “Beckham” days after its Oct. 4 release.

In the episodes, David noted that there were “some horrible stories that were difficult to deal with,” but never admitted to cheating with Loos.

“It was the first time that me and Victoria had been put under that kind of pressure in our marriage,” he said in the fourth episode.

“It was the hardest period for us,” the former Spice Girl added. “Because it felt like the world was against us. And here’s the thing, we were against each other if I’m being completely honest.”

The pair married in 1999 and claimed that their move from London to Madrid also played a role in their relationship stress.

“You know, up until Madrid, sometimes it felt like us against everybody else. But we were together, we were connected, we had each other,” added the singer. “But when we were in Spain, it didn’t really feel like we had each other either. And that’s sad.”

According to Victoria, it was “the most unhappy” she had ever been.

When several viewers sent well-wishes to Loos on social media, she wrote “Thank you” in response, adding: “[I] am taking in the nasty comments with as much humor as I can.”

Now, Loos says that David is playing the “victim” years later.

“I understand he has an image to preserve, but he is portraying himself as the victim and he’s making me look like a liar, like I’ve made up these stories,” she told the Daily Mail. “It’s all, ‘poor me.’ He needs to take responsibility.”

In the doc, Loos felt David was “indirectly suggesting” that she was the one who “made Victoria suffer.”

“Yes, the stories were horrible, but they’re true,” she alleged. “He talks in the documentary about this ultimately being his private life, shutting it down. I think it’s one thing to keep your private life to yourself. It’s another thing to mislead the public.”

Loos is now a medical assistant living in Norway. She wanted to come forward to defend herself amid David and Victoria’s latest remarks.

“And I also have a family and I also have children and they also have Google and they can also watch documentaries,” she told the outlet. “And I want them to know that their mother was brave enough to stand up against them and to stand up for the truth.”

“I was very sorry for what I had done and the way I handled it, but life’s biggest mistakes are the best lessons learned,” she continued. “Things happen for a reason. And now I have a wonderful life with my incredible husband and children.”

Loos married Norwegian doctor Sven Christjar Skaiaa in 2012 and the pair share two sons. The Beckhams have four children: Brooklyn, 24, Romeo, 21, Cruz, 18, and Harper, 12.