The 32-year-old blonde bombshell teased her 576,000 Twitter followers when she spilled all on a rather saucy behind-the-scenes incident on Countdown.
The eye-popping revelation began when host Nick Hewer, 74, tweeted his own 227,000 followers announcing his new book, saying: “’My Alphabet’ starts 3 part serialisation in Daily Mail today — insider stories on The Apprentice and more.
“In bookshops 6 September or order online now. As Lord Sugar remarks, ‘I always knew he was quite reckless but I had no idea he was so reckless,’” he added, sharing a snap of the new release.
Rachel Riley retweeted the post adding: “Hewer the Skewer’s top secrets!
“Not sure if the story of the home-made crotchless pants once sent to Countdown made the cut (so to speak) did they @Nick_Hewer?!” she quipped.
Quick to reply, the Countdown host revealed: “What, the nylon red net model? Certainly and the story is in episode 2 in tomorrow’s Mail.
“Be still my beating heart.”
Maths whizz Rachel seemed to find his response hilarious, reposting it along with a series of emojis, including a pair of scissors, underwear, and laughing faces.
Fans took to the comments section, clearly eager to hear more, with one saying: “Who sent them Rachel?”
“Now that’s a tale that needs telling, Rachel?? ha ha,” another cheeky Twitter user chipped in.
Rachel and Nick’s Countdown co-star Susie Dent, 53, took to the social media site to share her enthusiasm for his new project.
Joking about the image of him on the cover, she said: “I find the cover photo a little scary but I genuinely can’t wait to read this.”
Referencing his promise that the book contained “The Apprentice, Countdown, a kidnapping, knickers, schooldays, nicotine, childhood, a murder”, Susie added: “N.B. neither the knickers nor the murder have anything to do with Countdown. To my knowledge.”
Nick’s business mogul pal Lord Sugar, 71, also tweeted: “Can’t wait to read this. Will be full of fun and adventure and amazing stories.
“Seriously he has been around. Where is my sign copy Nick?”(sic) he asked, to which Nick said: “Don’t worry — I’ve put one aside and another for Lady Ann. Look forward to handing them over when you get back.”
In the first installment of his new book, Nick told the Daily Mail what it really took to be Lord Sugar’s aide on The Apprentice.
“Truth is, any fool can do what Margaret Montford and I did, or Karren Brady and Claude Littner currently do,” he said. “It’s not difficult.
“All you have to do is possess fairly good secretarial skills, a modicum of business sense and a huge dollop of stamina.
“The real talent and worth of the show is when Lord Alan Sugar silently appears through that glass door, enters the boardroom and gets to work on dissecting the task in hand, discovering who was responsible for its failure or, indeed, success.”
Nick said it was the stamina which caused him to “pack it in” in 2014, admitting: “Because after 10 years I’d had enough. I was exhausted and bored and irritable and I thought: right, I’d better get out of this before I become a nuisance.”