Duchess Catherine took a sneaky holiday away from her kids and husband to celebrate with her little sister Pippa

LONDON, ENGLAND - JULY 08: Pippa Middleton (L) and Catherine, Duchess of Cambridge sit in the Royal Box during the Gentlemen's Singles final match between Roger Federer of Switzerland and Andy Murray of Great Britain on day thirteen of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 8, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)

It was a girls’ trip for Duchess Catherine and Pippa Middleton.

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According to PEOPLE, the Duchess took her own vacation to hit the slopes of Meribel in the French Alps to celebrate her younger sister’s bachelorette party. Pippa will wed financier James Matthews in May.

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The sisters reportedly partied with friends in a luxury chalet with a maid and chef. Prince William was also on vacation with his friends about 100 miles away in Verbier, Switzerland, at the time of the bachelorette party. He and his wife reportedly flew on the same private jet to get their respective vacations.

It is reported that the children, Prince George and Princess Charlotte, spent the weekend with the Middletons at their family home.

Pippa and Matthews are set to wed on May 20 with a reception at the Middleton family home in Bucklebury.

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