No boys allowed! Love Island's Katie Salmon and Big Brother's Sallie Axl slip into tiny bikinis to flaunt their busty assets and peachy derrières as they enjoy a day draped all over one another at a Ladies Only spa.

Their stints on their respective reality television shows gave them plenty of opportunity to publicly flaunt their wares in barely-there ensembles.

And so Katie Salmon of Love Island and Sallie Axl of Big Brother jumped at the invitation to spend some downtime at Ladies Only Carnatic Spa in Liverpool on Tuesday.

Clearly loving it there, Katie was on her second pool day this week, having been snapped sashaying around the vicinity in a hot pink bikini the day before.

The 21-year-old reality star showcased her pert behind in an aquamarine two-piece bikini, with a scaly-design to it.

Channeling mermaid chic, she wore her dark blonde mane thick and loose around her shoulders, pushing it away lightly to showcase her heaving bust.

Her bottoms featured tied ribbons at each hip, connecting the front of with a string of pearls detail, teasingly stretching at Katie's waist.

Ditching the rope detailed wedge heels of Monday's poolside frolics, the reality personality tip-toed bare-foot along the water's edge, perhaps hoping not to disturb any of the other ladies at the all-female retreat as they lay out in the cloud-ridden Liverpudlian skies. 

Bending over, perhaps to examine the detail in the pool's underwater tiling, Katie showed off her endless honed pins and the script tattoo she has stamped on to the backs of her thighs.

Protecting herself from the cloudy haze above, Katie was sure to keep her oversized shades clamped to her face.

Joined by Sallie, the duo were sure to assist one another with their slightly slipping swimwear, lest there be an unfortunate spillage.

Sallie wore her chestnut locks in a high ponytail and sported a pair of aviator shades as she sipped on pink champagne as she perched on the side of the hot tub.

Sallie was also sure to show off her own heavily-tattooed physique in a black swimsuit, cut into thin strips at the middle, showing off her toned waist beneath. 

It seemed that the front of her costume was in need of adjustment; but thankfully, Katie came to the rescue, helpfully inserting one finger between Sallie's barely contained bust to make sure they were both securely aligned.

She then nipped off to the side of the pool, where she was clearly caught off guard while exiting the water.

Katie was sure to freeze quickly, never one to bypass the chance to pose, and she hastily positioned herself into a natural stature.

The glamour models didn't really do any swimming, but instead stayed above-water and preened each other to pass the time. 

Looking bronzed, they managed to highlight her nude gloss-covered pout, with Sallie reclining back between Katie's legs for physical and moral support. 

Leaving little to the imagination, the pair toasted with a glass each of bubbles while they relaxed ahead of her luxurious treatments.

Katie, who left the Love Island villa in fourth place with Adam Maxted in 2016, enjoys treating her fans to racy shots.

And it looks like Katie could be set to engage in more of her wild antics on-screen.

A voiceover blunder during her recent appearance on Celebrity Sex Pod introduced her as an 'Ex On The Beach star' - despite having never been on the show. 

Meanwhile, Sallie was subject to a disastrous appearance on civilian Big Brother.

The 30-year-old, real name Sallie Waterhouse, entered the house on day one, with the public nominating her for eviction on day five.

She then became the much-dreaded first housemate of the series - which was on in 2013 - to be evicted and snubbed the final weeks later.

She has also tried her hand at fame on The X Factor in 2009, and waded into TOWIE territory in 2014, when she became involved in a Twitter spat with James Lock, over claims he cheated on his girlfriend, Danielle Armstrong, with her.