Kourtney Kardashian Takes a 'Siesta' in a Bikini After Wild Birthday Festivities

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It seems Kourtney Kardashian's wild night has finally caught up with her.

The 38-year-old reality star took to Instagram on Tuesday to share a pic of her mid-day "siesta" -- which included Kourtney's taned, toned bod and a hint of underboob.


WATCH: Kim and Kourtney Kardashian Rock Colorful Bikinis During Beach Day With Gal Pals -- See the Pics

The mother of three and her gal pals definitely deserve a little R&R after their crazy birthday festivities in Tulum, Mexico, which according to Kourtney's sister, Kim, included skinny dipping, "special" brownies, nipple clamps, twerking, naked cartwheels, a giant inflatable penis and Kourtney throwing up "in her bed four times."

V I E W S πŸ”₯πŸ‘

A post shared by Kourtney Kardashian Snapchat (@kourtneysnapchat) on

Birthday πŸŽ‰πŸŽ‰

A post shared by Kourtney Kardashian Snapchat (@kourtneysnapchat) on

Twerk it βœ”οΈ

A post shared by Kourtney Kardashian Snapchat (@kourtneysnapchat) on


WATCH: Kourtney Kardashian Celebrates Turning 38 in Her 'Birthday Suit' -- See the NSFW Pool Pic!

See more on the eventful vacay in the video below.