Rebecca Loos has accused David Beckham of "portraying himself as the victim" and making her "look like a liar" during his Netflix series.
She has also accused Beckham of being self-pitying and potentially damaging her reputation.
And she alleges he accuses her - albeit indirectly - of making Victoria Beckham suffer.
Loos, 47, was catapulted to fame in 2004 when she claimed she had an affair with the former England captain and sold her story to the press.
Claims of an affair have always been denied by the Beckhams.
In the documentary series, however, Victoria describes the aftermath of the allegations as the "hardest period" of their marriage.
David Beckham's demeanour during the new programmes is "all 'poor me'", Loos said.
In an interview with the Mail on Sunday, Loos said: "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.
"He is indirectly suggesting that I'm the one who has made Victoria suffer."
She also accuses Beckham of putting her back in the spotlight when she had no wish to be.
"So many people had forgotten about all of this," she said.
"He's dragged it back up again in a way that is affecting my reputation."
Loos was complimentary about Victoria Beckham, saying she thought the Spice Girl "came across well... very natural, very honest, very open".
But she added: "I can't say the same for him."
After the documentary was released, Loos said she "went online and saw all the articles", adding: "I sat on the sofa and just watched that one episode and was, well, shocked."
Now happily married with two children, Loos teaches yoga and works as a medical assistant in Norway.
Sky News has approached both David and Victoria Beckham for comment.