Kourtney Kardashian debuts baby bump in a sexy Instagram bikini pic

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kourtney-kardashian-baby-bump-debut.jpgProving she is not shy about showing off her baby body, Kourtney Kardashian debuted her third baby bump in an Instagram picture. 

The oldest Kardashian sister sure looks like she is enjoying her third pregnancy. In the picture, she appears to be living life to the fullest, jumping into the pool with friends in a string bikini.

The new addition will be Kourtney's third child with longtime boyfriend Scott Disick, joining siblings Mason and Penelope.  

Photo/Video credit: Getty Images, Instagram