The 36-year-old and her sisters and Keeping Up With the Kardashians co-stars Kim Kardashian, 34, and Kylie Jenner, 17, took part in a sexy photo shoot on Friday. Kourtney sported a black top that showed some crazy cleavage.
"Yeah, photo shoot fresh, lookin like wealth," Kourtney wrote.
"Such a fun shoot today. #sisters," makeup artist Mary Phillips said on her Instagram page.
Kim also wore a black top with a plunging neckline and Kylie showed her own cleavage in a white Balmain top with a criss-cross front design. The three also posed for a fun, silly pic, as seen on Kim's Instagram page.
Also on Friday, Kourtney posted a picture of herself that Kylie took on Thursday, which shows her wearing a cleavage-baring criss-cross halter top and sporting a braid.
The new photos are among the sexiest posted by the reality star since she broke up with Scott, 32, over the Fourth of July weekend following a month-long bender in which he was photographed looking cozy with an ex-girlfriend.
Scott returned to Los Angeles last week and reunited with Kourtney for lunch with son Mason Disick, 5, and daughter Penelope Disick, 3, on Thursday. Scott, who now lives in his own bachelor pad, spent Friday night partying in Las Vegas, marking his first celebrity appearance since the breakup. Kardashian spent the night at home with their three kids.