Chelsea Clinton Called Secret Service 'Pigs,' Says Her Parents Did Too, Book Claims

More shocking White House allegations surface from new book.

A firestorm is swirling around Chelsea Clinton after reports that she called the Secret Service "pigs" when she lived in the White House.

The startling account of what Chelsea allegedly said when she was a teenager came from author Kate Andersen Brower in her just-released book The Residence: Inside the Private World of the White House.

Brower told INSIDE EDITION, "Chelsea Clinton was on the phone with a friend and a Secret Service agent was there and waiting to bring her to Sidwell Friends, a private school she went to in D.C., and she said, 'wait a minute, the pigs are here.'"

The book quotes the former White House florist Ronn Payne as saying he witnessed Chelsea on the phone with a girlfriend when a Secret Service agent came into her room to take her to her private school.

Read: Why Michelle Obama Couldn't Teach Malia To Drive

"Oh, I've got to go, the pigs are here,"  Chelsea reportedly told her friend. The agent turned "Crimson," Payne recalled.

"Ms. Clinton, I want to tell you something.  My job is to stand between you, your family, and a bullet.  Do you understand?" the agent said.

"Well, that's what my mother and father call you," she replied.

Brower explained to INSIDE EDITION, "I don't believe that he made this up. These people don't have anything to gain making up stories. They're not in the public eye, there's nothing in it for them."

The revelation about Chelsea is now making headlines around the world.

Watch: Hillary Clinton Gets No Mercy From Late Night Comics Over Email Explanation.

INSIDE EDITION's Steven Fabian spoke to former Secret Service agent Dan Bongino, who served in the Clinton White House.

Fabian asked, "Do you believe this story about Chelsea Clinton and the President and Hillary Clinton calling the Secret Service pigs?"

Bongino responded, "I've never experienced anything like that. That's an extremely derogatory term and that's the kind of thing that would've spread through the Secret Service like wildfire."

But Brower stands by the story. "I was surprised by this story so I reached out to people who had worked with him at the White House just to make sure he was legitimate and they all vouched for him."