A tell-all book about Victoria’s Secret and one of its top execs is in the works, despite desperate attempts using private detectives and lawyers behind-the-scenes to block it.

Page Six previously revealed that married VS CEO Sharen Turney carried on a torrid affair with Cliff Donenfeld, a Naples, Fla., luxury real estate broker. He alleged she planned to leave her husband for him after he “opened a door [for her sexually],” then became “instrumental in every aspect of her life” during a two-year affair, which ended in 2010.

After the scandal broke last fall, Donenfeld began writing a book. But sources tell Page Six that Turney has tried to block the embarrassing tome that could tell much more than just Victoria’s secrets. “After the article, Cliff noticed black SUVs outside his house,” said a source. “He was then contacted by a Victoria’s Secret private eye who wanted to meet with him and their lawyer.” A friend added, “They’ve been trying to shut Cliff down and convince him not to include her in his book. But he’s standing up for himself. His book has many people and many chapters. This is one chapter. He contributed to Victoria’s Secret.”

Another source said, “They are trying to thwart Cliff from doing this book. But this was a consensual sexual relationship. Victoria’s Secret is famed for its racy show, but the company’s based in conservative Ohio and they are not happy about the scandal.”

The source added, “That’s what being rich is all about — be a freak, have affairs, do whatever you want. And write a big check. You have to be ­bullet-proof. It seems Cliff left some bullets in the chamber.”

Donenfeld, meantime, has moved on and is engaged to another woman. “His book is about redemption,” said a friend. “He was baptized in the past year and goes to church every Sunday. He’s doing really well in real estate.”

When reached for comment, Donenfeld said, “It is in my rights to write my memoirs, and I will write them.” Victoria’s Secret declined to comment.