
Candid pictures of Kim Zolciak in a bikini have emerged just hours after the reality star posted a very flattering selfie on Instagram.

The mother-of-six was captured in a rare unguarded moment while relaxing in a two-piece with her husband Kroy Biermann.

The 37-year-old was seen on a beach in Cancun, Mexico in a black two-piece with gold detailing and was sipping from a red cup while celebrating the couple’s fourth wedding anniversary.

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Buxom beauty: Candid photos of Kim Zolciak enjoying her Mexico vacation emerged this week after the reality star shared a series of very flattering selfies while giving her followers diet tips

Taking it easy: The 37-year-old star has been celebrating her fourth wedding anniversary with husband Kroy Biermann and shared an image of the couple (right) on Wednesday which was purportedly taken by her daughter

The pictures surfaced after the Don’t Be Tardy star posted a picture to social media that showed her with a tiny waist and thigh gap.

In the post, she boasted about her diet secrets and promoted a slimming shake which she endorses.

Kim has been accused of Photoshopping her Instagram pictures by fans before, which she has always denied.

Natural: While the TV star clearly looks fantastic after six children, it was hard not to notice the striking difference between the candid snaps and her social media pics

Getaway: The reality star is soaking up some sun with her family this week and was seen strolling a white sandy beach with her husband of four years

Skimpy: Kim donned a black and gold string bikini for the leisurely day

Athletic: Kroy, 30, wore a colourful pair of board shorts displaying his muscular body and tattoos

Family fun: The couple - who are based in Atlanta - share six children together. Their eldest Brielle and Ariana, joined them on their Mexican getaway

While the TV star clearly looks fantastic on the beach after six children, it was hard not to notice the striking difference between the candid snaps and her social media shares.

The family have been sharing selfies from their beach break on Instagram, happily hamming it up for the camera while larking around in bikinis.

In one vacation selfie, the mom of six wowed in a tiny Agent Provocateur black bikini, showing off her amazing curves.

The low-cut top revealed her ample cleavage, while the barely there bottoms featured peek-a-boo slits.

Sand between their toes: Kim showed off a skimpy string bikini with gold chainmail portions

Lovebirds: Kim and Kroy met in 2010 at the charity event Dancing with Atlanta Stars and were married a year later

Candid: The star hit back at critics last year when she was accused of photoshopping a thigh gap into an Instagram photo

Blingtastic: The reality star flashed her huge diamond engagement ring as she stood hand on hip

Chill out time: Kim reclined on a lounger as Kroy, 30, enjoyed a cold beverage

Time to tan: Ariana, 14, wore a colour-block swimsuit for the beach day

The star posted the photo on Instagram, writing: 'I eat dessert every night after dinner, whether it's a few bites of cake, a cookie etc I love chocolate.'

Adding: 'You can definitely pinch an inch or five for that matter but I love to live and I love to eat.'

Just over a year ago the former RHOA star hit back at critics who accused her of photoshopping a thigh-gap into a selfie.

Kim wrote in a picture caption that she gave 'zero f**ks' what people said online and ranted: 'From photoshopping a thigh gap, to photoshopping my breast, to photoshopping a butt how about.. it's me alllll F***** ME haters ..every last bit is ME!! Zoom in real f***** close too... I dare you... no photoshopping!!'

End of the day: Kim leaned in close to her hubby as the sun went down at the resort

Quiet time: The TV personality sat enjoying the view for a moment

Taking it all in: The couple chatted as they stood watching the surf

Fun in the sun: The duo enjoyed a splash about with 18-year-old daughter Brielle on Thursday this week

Big brood: As well as Brielle, the couple share Ariana, 14, three-year-old Kroy Jr. Kash, three, and twins Kane and Kaia, two

Got his hands full: Kroy, 30, got to grips with his spouse as Brielle giggled nearby

BIkini babes: Kim's lookalike daughter accessorized with stylish aviators and a cross necklace

Kim's lookalike daughters Brielle, 18, who recently split from her boyfriend Slade Osborne, and Ariana, 14, both posted snaps from the trip on social media.

Kroy adopted Brielle and Ariana, Kim's daughters from previous relationships, shortly after they wed.

In the Instagram photo with her daughters, the reality star poses with her hand in the air as she shows off her toned body.

Having a moment: Kim and Kroy enjoyed a smooch in the ocean as the former RHOA star wrapped her arms around the Atlanta Falcons player

Hitching a ride: Kim jumped on the back her man while wearing stylish mirrored aviators

Bit a wobble: The Don't Be Tardy star was thrown about a little in her strappy Agent Provocateur bikini

Soaked: The mother-of-six got drenched by oncoming surf

Wipeout: The former Dancing With The Stars contestant almost spilled out of her padded bikini top

Doing well: Kim has seemingly recovered well from her heart surgery last month following a mini stroke

The former Dancing With The Stars contestant married the Atlanta Falcons defensive end on November 11, 2011.

The Don't Be Tardy star and her husband are parents to four children: four-year-old Kroy Jr., three-year-old Kash, and one-year-old twins Kaia and Kane.

In one snap she shared to her 1.7 million Instagram followers, the stunner is caught hugging her husband, showing off her pert derriere.

Kroy, who has his arms around his bikini-clad wife, grins widely.

Beach babe: Brielle wore a pretty black halterneck bikini as she enjoyed a cooling dip

Golden girl: Brielle is Kim's eldest daughter from a previous relationship

Cooling off: Kim appeared to be in her element as she splashed about in the Atlantic

Lovestruck: The Atlanta Falcons star was very hands on with his wife who tied her blonde locks up in a messy bun

Close bonds: Brielle appeared to be enjoying a joke with her mother and adoptive dad

Romance: The blonde beauty has spent much of the week gushing about her husband who she described the 'love of her life'

She captioned the photo: 'Happy anniversary to the love of my life, my best friend, my babies daddy, my strength, my heart and soul, the man that puts up with my madness.'

Adding: 'The most incredible man I have ever met in my lifetime I love you! You keep me smiling, laughing and loving life. Thank you for choosing me.'

The blonde is currently in her fourth season of her hit Bravo TV show, Don't Be Tardy, which first aired in 2012.

Kim was recently forced out of Dancing With The Stars after suffering a mini-stroke and later had heart surgery.

Just like mom: The reality star's daughters Brielle and Ariana hammed it up for the cameras

Family fun: Ariana shared a poolside picture with fans on Instagram