Ashley Hart shows a hint of side-boob as Renee Bargh Instagrams her naked in the tub

They've been holidaying in Mexico and documenting their travels on social media along the way.

And on Monday, Renee Bargh took to Instagram to share a cheeky snap of her best friend and fellow Australian, Ashley Hart, who was enjoying a bath from their beachside hotel in Tulum, Mexico.

Ashley, 27, appeared to be naked in the photo, showing a hint of side-boob while facing away from the camera, her blonde locks tied up in a messy bun.

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Bathing beauty: Ashley Hart, 27, was caught taking a bath by her friend Renee Bargh as they enjoy a holiday in Tulum, Mexico

The intimate snap was captioned: 'My bathing beauty @ashleyhart1111 The @azuliktulum is an incredible ecological resort.'

Renee, 29, added: 'The Mayans considered the cenote water to be sacred water, therefore every time you take a bath in Azulik you are bathing with sacred water. Which has great cleansing properties for the skin.' 

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She continued to explain: 'Once the water leaves the tubs, it goes through a filtering process to be reused for watering the plants at the resort.'

Beach bunnies: Earlier in the day, 29-year-old Renee shared a snap of herself with Ashley as they both flaunted their incredible physiques at the beach

Hours earlier, the Extra TV presenter shared a stunning shot of herself and Ashley while enjoying a swim in the ocean.

The image showed the gorgeous duo embracing each other as they flaunted their incredible bikini bodies in the shallows.

'Thank god for this one,' Renee captioned the image, referring to her model pal.

Sun's out, buns out: Ashley also took to Instagram to show off the pair's best assets as she shared a photo of their toned bottoms

Meanwhile, Ashley made sure to show off the pair's best assets as she shared a cheeky photo of their pert derrières.

Both sporting Brazilian-cut bikini bottoms with their buns covered in sand, Ashley held her friend's hand in the photo captioned: 'Cheeky Beach Bums! #friendship #sisterhood #love #support #gratitude.'

On Sunday, Ashley shared another photo of the pair, in which they truly embraced their surroundings despite the wet weather.

'Caught in the rain...Surrender and embrace! @reneebargh #tulum #mexico,' she captioned the image, with the famous friends positioned on their own bicycles.

Bikini babe: On Saturday, television presenter Renee showed off her abs in this stunning snap of herself

Navigating their way through the area on the bikes, the stunners slipped their feet into comfortable sandals to make pedalling a bit easier.

Renee layered her blue bikini with a plunging black blouse, while Ashley draped a printed kaftan-style number over her green patterned swimwear.

There's no doubt the glamazons are enjoying some time away from their busy lives in the spotlight.

Cherishing the moment, they flashed their pearly whites will having their eyes closed for the snap. 

Fun ride: Navigating their way through the area on the bikes, the stunners slipped their feet into comfortable sandals to make pedalling a bit easier

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