Kim Kardashian shows off her derriere and post-baby body in skintight outfit as she films KUWTK with Kylie Jenner

The sisters wore black outfits in very different ways as they filmed Keeping Up With The Kardashians in Los Angeles. While 18-year-old Kylie covered up, Kim, 35, was showing off her post-baby body in a skintight outfit, four months after giving birth to son Saint. See more photos when you continue...