But, the stars kept things SFW; the shoot was actually for Kim, Kourtney and Khloe's Kardashian Kollection Lipsy launch.
The photo shoot with Richardson marks Kim's first modeling pics since she gave birth back in June, and the new mom looked gorgeous modeling the line's form-fitting dresses.
And like all Kardashian products, the sisters are eagerly promoting the upcoming line's launch on social media. Last week, Kim posted a behind the scenes photo with Richardson to her Facebook account to drum up buzz, while Khloe posted one of the photos to her Instagram account, and wrote, "Kardashian Kollection launches THIS Thursday October 24!!! Check out @lipsylondon stores and online at lipsy.co.uk wooooohoooooo"
Richardson photographed Kim back in 2010 at the Chateau Marmont for the Sunday Times -- with a decidedly sexier tone.