When it comes to showing off her birthday suit, Kourtney Kardashian can’t stop, won’t stop!

The newly 38-year-old reality star is celebrating her birthday with a girls’ trip down to Mexico — and it’s clear the ladies don’t need the men to get a little ~frisky~!

https://www.instagram.com/p/BTVGKctDMvX/

Kourt shared a picture of someone skinny dipping in the pool at the home where they’re staying; some of the guests on the birthday trip include Kourt’s sister Kim and their pals Larsa Pippen, Jen Atkin, Brittny Gastineau, Joyce Bonelli, Malika and Khadijah Haqq, Hrush Achemyan, and Steph Shep — though it remains a mystery who appears in the naked Snap, which the mom-of-three captioned, “When your friends stay naked.”

MORE: All of Kim’s New Lipstick for Her Kylie Cosmetics Collab Are Named After Herself

While it may not be Kourt in that particular pic, there’s been no shortage of sexy pics of the reality star!

View this post on Instagram

This is how we do it down in Puerto Rico

A post shared by Kourtney Kardashian (@kourtneykardash) on

The KUWTK star didn’t let her sister’s booty overshadow hers and shared a shot of her butt on Instagram, as well as one that showed off her totally taut tummy and breasts.

Kourtney and her gang are staying at Caa Aramara, the private estate of Kardashian family friend/Girls Gone Wild founder Joe Francis down in Punta Mita, Mexico.

View this post on Instagram

Girls Trip

A post shared by Kim Kardashian West (@kimkardashian) on

It’s clear that Kourt has had a fun time on her birthday getaway!

On Twitter, Kim revealed that her big sis “threw up in her bed four times,” and still managed to sleep in it!

Kourt also had her followers rolling when she tweeted, “You can’t say happiness without saying penis,” and retweeted Kim’s confession that “Despacito” — which happens to feature Kourt’s former fling, Justin Bieber — was “on repeat.”

Sounds like these ladies had a blast on their much-deserved vacation!

For those wondering, it would appear Khloé missed out on the fun because she stayed back to watch Kourtney’s three kids, Mason, Penelope, and Reign — but don’t worry, they had plenty of fun too!