Kris Jenner dishes about her Mile High Club time with ex-Caitlyn Jenner

NEW YORK, Oct. 9 (UPI) -- Kris Jenner revealed that she and her ex- Caitlyn Jenner (formerly known as Bruce) joined the mile high club during a first class trip on a commercial airline.

According to Us Weekly, the 59-year-old matriarch dished details of her flight in an interview for Cosmopolitan's 50th Anniversary November cover, which she shot alongside her five famous daughters, Kim Kardashian, Kourtney Kardashian, Khloe Kardashian, Kendall Jenner and Kylie Jenner.

Jenner cringed as she recounted the embarrassing moment. The reality star even told the magazine that at the time, she thought they "got away with it."

But she was wrong.

"We had sex in the bathroom and we came out and nobody said anything," Jenner explained. "At the end of the flight, the flight attendant got on the microphone. 'Congratulations, Mr. and Mrs. Jenner! You've just joined the Mile High Club. We're so proud of you, and we decided to give you a bottle of champagne! Yay!' I could not squish down in my seat low enough. I was mortified!"

The magazine dubbed the ladies "America's First Family," a nod to their enormous fame and the fact that they were the first family to make the cover.

Khloe posted a photo of the cover on her Instagram saying, "We're so excited to reveal our November @Cosmopolitan cover in honor of Cosmo's 50th birthday! Make sure to follow @Cosmopolitan for behind-the-scenes photos from the shoot and look for the issue everywhere in stores next week!"