They're rarely shy about showing off their bikini bodies.

So it was little surprise that 40-year-old Kim Zolciak and her 22-year-old daughter Brielle Biermann were only too keen to each display plenty of skin during the pair's beach holiday.

In one photo, mom Kim flaunted her peachy posterior in a pair of skimpy bikini bottoms as the reality TV star danced seductively to the music of Post Malone.

Flaunting it! It was little surprise that 40-year-old Kim Zolciak and her 22-year-old daughter Brielle Biermann were only too keen to each display plenty of skin during the pair's beach holiday. Kim pictured here in today's Instagram post

The booty-ful snap of the mother-of-six included the caption 'Don't play @postmalone when Kimmy's drinking'.

Zolciak's hands were placed against a column as she danced with blue waters in the background.

Another pic of the blonde beauty -this time reclining in a chair by the water- showed off her smaller chest.

The Don't Be Tardy star recently underwent a breast reduction, revealing she went from a size DD to a size C to improve her quality of life.

Shake it mama: The booty-ful snap of the mother-of-six included the caption 'Don't play @postmalone when Kimmy's drinking'

Meanwhile, daughter Brielle Biermann flaunted her own impressive bikini body during the family's dream vacation.

On Wednesday the screen siren was seen in her leopard print bathing suit as she sat on a Sea Dog jet ski in an image shared to social media.

The caption read, 'Lemme drive da boat @sunandfunseasport.'

Sitting pretty: Brielle Biermann has an impressive bikini body and she has been showing it off nearly daily as she enjoys a dream vacation

The beauty had a deep tan and oiled up body as she leaned forward onto the jet ski which was green and white.

Brielle wore her wet hair down and had on rose tinted sunglasses with a clear frame.

And she added a wide gold bracelet with a hair tie.

Earlier she showed off her bottom while in a blue and white bikini.

Vroom: On Wednesday the 22-year-old siren was seen in her leopard print bathing suit as she sat on a Sea Dog jet ski in an image shared to social media. The caption read, 'Lemme drive da boat @sunandfunseasport'

She was laying face down on an outlet made of large stones that was surrounded by light blue water.

The star had on a thick French braid and her face could not be seen.

The caption read, 'Sunny & 75 and y’all still have a better view than i do.'

Another look at her: Earlier she showed off her bottom while in a blue and white bikini

Close family: Her mother is 40-year-old Kim Zolciak of RHOA and Don't Be Tardy

She sported a tiny striped bikini set with her gluteus maximus stealing center stage.

And before any of her 1.3 million followers could comment on her tiny waist and larger behind, Brielle assured there was no Photoshopping involved.

'I DIDNT EVEN FACETUNe i was SO PROUD OF MYSELF,' she wrote in the comments.

Baring all: Sunday saw Kim share a nude shot whilst using her body to keep modest

Beach days: Both Kim and Brielle have spent the past few days on a family vacation, sharing a series of very racy shots

Both Kim and Brielle have spent the past few days on a family vacation, sharing a series of very racy shots.

Sunday saw the 40-year-old reality star share a nude shot whilst using her body to keep modest.

Make up free Sunday’s #iwokeuplikethis. I’ve had this outfit for years ⛱ photo credit my hot hubby @kroybiermann,' she captioned.