In a new interview with Daily MailLoosslammed the soccer star for the way he and his wife, Victoria Beckham, handled the allegations.
"It's all, 'poor me,'" Loos told the outlet.
"He needs to take responsibility. He can say whatever he likes, of course, and 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 added of the alleged affair, which reportedly went down in 2003 when Loos was serving as David's assistant.
Loos, now a yoga teacher, said after watching the doc, she believes David is "indirectly suggesting" that she is "the one who has made Victoria suffer."
"Yes, the stories were horrible, but they're true," Loos maintained. "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, who is married with two children, also slammed David for bringing the allegations to light again, 20 years later -- something that she said has deeply hurt her and her family.
"So many people had forgotten about all of this," Loos added. "So many people put all this behind them, this whole affair, the scandal and everything. And he's dragged it back up again in a way that is affecting my reputation."
She continued, "I think if he was going to touch on this time and how difficult it was, it would have been really nice for him to have said, 'It was not my proudest time.' But he specifically made it look like... my fault, that he had nothing to do with this."
The athlete's alleged infidelities with both Loos and Sarah Marbeck were discussed by Victoria and David in the doc's fourth and final episode, with the former Spice Girl calling it the "most unhappy" she's been in her marriage.
"It was probably, if I'm being honest, the most unhappy I have ever been in my entire life," Victoria admitted.
While David had moved to Spain following his transfer to Real Madrid, Victoria stayed behind in the U.K. with their sons, Brooklyn and Romeo. The weight of the rumors, however, had the couple feeling like they were against each other and the world, prompting Victoria to move to Spain to be by her husband's side.
"It was the hardest period for us because it felt like the world was against us," Victoria said in the doc.
She continued, "And here's the thing, we were against each other if I'm being completely honest. You know, up until Madrid, sometimes it felt like us against everybody else, but we were together, we were connected, we had each other. But when we were in Spain, it didn't really feel like we had each other either. And that's sad."
While David did not touch on his part in the alleged affairs, he did acknowledge how hurtful the rumors were for Victoria and their family as a whole.
"Victoria is everything to me, to see her hurt was incredibly difficult, but we're fighters, and at that time we needed to fight for each other, we needed to fight for our family," David said. "And what we had was worth fighting for."
Loos, who previously responded to the backlash she received on social media following the doc, told the Daily Mail that at the end of the day, she's deeply sorry for what happened and the way it was handled.
"I was very sorry for what I had done and the way I handled it," Loos said. "But life's biggest mistakes are the best lessons learned. I want people to be happy I want families to be happy. I don't want to break things up."
TooFab has reached out to David's reps for comment.