Did Kate Middleton Attend '50 Shades of Grey' Sexy Parties In the Past? [PHOTOS]

An ex-classmate of the Duchess of Cambridge has made herself quite the party-planner for whipping up "romps" ala 50 Shades of Grey. Did the Duchess attend one of her parties in the past?

Since the popularity of 50 Shades of Grey surged, women around the world have been curious about playing it "dirty and mysterious" when it comes to their private lives. Emma Sayle, an ex-classmate of Kate Middleton in the posh all-girls school, Down House, has been organizing parties with an elite S&M feel that can be read in the famous E.L. James novel.

"Killing Kittens" is an exclusive organization holding parties in luxurious penthouses in Surrey, London, and even in Los Angeles. The series of upscale parties cater mostly to women, and are following three rules:

"Women make the rules and break the rules,"

"No means no,"

"Men can't approach women."

Truly making female members in control of the meeting and greeting of their chosen partners, Sayle has been concocting these parties way before the popularity of the novels. "Killing Kittens" started 7 years ago, and since the novels broke out, membership rocketed to 25,000 women worldwide.

Unfortunately, not all women can get in "Killing Kittens." Sayle explained the membership process and how picky she can get.

"Our parties are very elitist, very underground. The women are always in control. There is no tying up and no spanking. And we have strict vetting criteria. If I wanted to open it up to anyone and everyone and make hundreds of millions of pounds, I could have done that in year one. But it's all about keeping it really elite and niche" said Sayle in an interview with the Mail Online.

Sayle also described the sophistication of her parties, saying that the atmosphere is very swank and ritzy.

"We have jazz, oysters and champagne - with a very posh crowd of about 100 people a time. They are nice cocktail parties, really - and then you might go upstairs, or out on the terrace, and you'll see stuff going on. Some people come and get involved, and about 40 per cent don't - they just dance around in their underwear and chat."

The question is, did the Duchess attend one of her parties knowing that Kate might be a big fan of 50 Shades of Grey? Sayle revealed that back when they were attending the same school, Middleton became part of an organization she started called "The Sisterhood."

"It was great Kate being there. She was only around for three months but she is a nice girl. The dragon boat showed her doing something on her own. With a certain type of girl, they go into a relationship and the next thing you know their whole life has become about the man and his social life. The Sisterhood is great for a girl's confidence because it gives them something of their own." added Sayle.