Kourtney Kardashian shares nude photo of Kendall Jenner, her “Saturday muse”

What’s a big sister for if not to post nude photos of you online? Of course, it helps if the nude photos were taken by professional photographer Russell James, which was the case with Kendall Jenner, whose not-really-SFW nude photo above was posted by her big sis Kourtney Kardashian yesterday along with the caption, “Saturday muse.”

Kendall Jenner, or actually just Kendall, has posed for Russell James often, and has pretty much made numerous headlines with each shoot. She wore a sheer top that left little to the imagination in a photo posted back in November, and before that she shared this photo of herself as a topless mermaid:

Wow! this is serious, I think she's taken on the step of her Big Sister Kim Kardashian... What do you think about this step by Kendall?