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This Sunday on the brand new Keeping Up With the Kardashians, you see much more of Kourtney Kardashian's glowing, pregnancy body than you ever have before! 

In the above sneak peek, Kourtney poses for her DuJour cover story while pregnant with her third child, Reign Aston Disick

During her shoot, Kim Kardashian and Scott Disick both make cameos to show their support! 

At one point Scott asks, "Are you wearing underwear?" To which Kourtney smirks and replies, "No."  

Kourtney Kardashian

"She does look quite amazing, I mean she's really got a glow to her, so I'm pretty proud of her," Scott boasts. 

Check out the above sneak peek clip from this Sunday's brand new episode! 

Tune-in for a brand new Keeping Up With the Kardashians this Sunday at 9/8c on E!