Focusing on her front this time, Kim wrote, "It's a little blurry but you know what it is..."
The 33-year-old socialite also shared a shot from her workout, adding, "Gym time while my baby is napping!"
We're guessing Kim's stepbrother Brody Jenner finds the photos sexy -- he'll be confessing that after seeing Kim nearly nude during a photo shoot that he was a little turned on during Sunday night's episode of Keeping Up With the Kardashians.
In a clip from the new episode Kim sets up a sexy photo shoot for hubby Kanye West while the family vacationed in Thailand.
Kanye couldn't make the family trip, so Kim wanted to give him a memento from her trip. But while being photographed by her assistant, Brody accidentally walked in and caught a glimpse of his stepsister in a "see through, white, ass out, t*ts coming through the top -- the whole nine" outfit.
Jenner then headed back to the room where his brother Brandon and sister-in-law Leah were.
"You just saw Kim naked?" Leah asks. "Brody, did you get turned on by Kim?"
A clearly embarassed Brody then denies that he was turned on as Leah pushes him to answer her question, and then he shamefully admits that he got "maybe just a half chub" as he leaves the room.