Not only did the reality TV star slip into some revealing underwear for a breast pumping Instagram pic over the weekend, but she also got real about Scott Disick's recent trip to rehab, her mother's relationship with Bruce Jenner and sister Kim Kardashian saying she "bought" Kourtney her career.

Kourt was in Vegas all weekend long, where she hosted a preview of Marquee Dayclub at The Cosmopolitan of Las Vegas on Saturday. While on the red carpet, she got very candid about her personal life.

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