Heather Thomson, a former cast member of The Real Housewives of New York City, has made some shocking allegations against her former co-star, Sonja Morgan, in a tell-all book by entertainment journalist Dave Quinn, titled Not All Diamonds and Rose: The Inside Story of the Real Housewives from the People Who Lived It.

The book allegedly spills all the behind-the-scenes secrets happening between the Bravo production and all the cast members of the Housewives franchise.

One of the most shocking allegations being exposed in the book was made by Thomson regarding her former RHONY co-star.

During the RHONY Season 7 cast trip to Atlantic City, Thomson recalled Morgan allegedly made her and another co-star, Kristen Taekman, wait in the lobby room of her luxury townhouse while Morgan was getting herself ready for the trip.

Thomson alleged that Morgan didn’t even offer her and Taekman to come into the house even though it was “raining out.”

According to Thomson, that’s when she “turned on” Sonja and dropped the bombshell.

“That’s actually when I turned on Sonja, because I had literally carried that woman home,” Thomson claimed in the book.

“I had scraped her off carpets. I had taken her out of a vestibule where she was letting guys put lit cigarettes in her vagina.”

Thomson couldn’t believe Sonja’s treatment of her.

“I had done so much for that woman. And here we are, waiting to go to Atlantic City. We all arrived at her house, but the limo wasn’t there yet. And it was raining out. Well, she would not let us in,” she added.

Morgan, a fashion designer, addressed the alleged situation involving Thomson and Taekman, claiming she was in a tricky spot after speaking to her sister during the incident.

“I was upstairs, and my sister called me to tell me someone we knew had died,” she shared.

“She was supposed to come take care of my daughter [Quincy], but because of this death, she couldn’t. I didn’t have a housekeeper, and I had my daughter there who doesn’t film… anything could go wrong.”

Thomson and Taekwan left the show following the airing of the 2016 season while Morgan continued being a cast member till the latest season, which just finished airing in September.

In addition to the shocking allegations, the book also includes insider information about the Housewives franchise.

Quinn, who has been covering the Real Housewives franchise for over a decade, claims that his book is not about bashing the Housewives, but rather, it’s about giving fans an inside look into the show.

“I’ve been covering these women for over a decade, and I’ve seen so much that never made it to air,” Quinn said in an interview with Page Six.

“I wanted to write a book that would give fans a real behind-the-scenes look at what it’s like to be a Housewife, and what really goes on during the production of the show.”

Quinn also revealed that he had interviewed over 60 Housewives and production members for the book, and that it covers all of the franchises, including Atlanta, Beverly Hills, Dallas, Miami, New Jersey, Orange County, Potomac, and Salt Lake City.