Kim Kardashian has been sharing sexy bikini photos from her vacation in Turks and Caicos for several days.
And on Monday sister Kourtney - who is only one year older - seemed to want to remind Mrs Kanye West who's boss as she posted an incredible bikini snap.
The mother of three was kneeling on her yellow surf board as she modeled a metallic two piece with the caption, 'Sporty Spice.'
Sun goddess: The mother of three was kneeling on her yellow surf board as she modeled a metallic two piece
More to look at: The college graduate sat on her legs in an identical pose to Kim's
Meanwhile, Kim has been sharing mirror selfies in her bikini. And on Monday she sat on a surf board too, only she was in profile.
Kourtney also dropped jaws as she shared with fans snippets of her idyllic beach vacation on Sunday.
The reality star, 38, looked absolutely amazing as she walked out of the beach in a string bikini.
Kourtney has been soaking up the sun alongside her boyfriend Younes Bendjima.
So 007: Here the Calabasas resident looked like Honey Ryder from the 1962 James Bond movie Dr No
Loving her look: Meanwhile, Kim has been sharing mirror selfies in her bikini
More to love: Mrs Kanye West shared this incredible photo soon after Kourtney shared her surf board pinup shot
The reality star also posted a video clip as she strolled down a boardwalk toward the beach where a healthy breakfast of fruit and juice awaited her and Younes.
The brunette beauty was also back on one of the resort's bikes, this time wearing an eye-catching crocheted, off-the-shoulder crop top and matching big panties in cream.
A source told E! News the pair are staying at the 5-star Amanyara Resort, one of the most lavish on the island, but had left for Los Angeles on Saturday.
Water goddess: Kourtney showed off her gym-honed body in a black string bikini as she emerged from the Caribbean on her trip to Turks & Caico with Younes Bendjima Sunday
Sister act: Kim Kardashian showed off her legs as she soaked up the sun in Turks & Caicos on Sunday
Having a wheely good time: The 38-year-old, who is on a romantic break with her beau Younes Bendjima, 24, in the Turks & Caicos, posted this shot of herself on a bike on Sunday
Pedal power: The brunette beauty wore an eye-catching, crocheted, off-the-shoulder crop top and matching big panties in cream as she cycled along
Healthy breakfast: A platter of fruit, juice and guacamole waited for the couple on the beach
They have 'a private villa overlooking a pond with a private swimming pool and chef,' according to the insider.
'They were very sweet together and blissfully in love. They seemed like they were on their honeymoon the way they held hands and smiled at each other.'
While the website reported the couple had jetted back to Los Angeles on Saturday afternoon, it's possible Kourtney is just sharing throwback photos of her getaway.
It looks like Kourtney's daughter Penelope, five, had also joined them.
Beautiful view: Kourtney filmed the beautiful view as she strolled on the boardwalk
Beach bling: The reality star even took a snap of her Chanel slides sitting on the sand
Who's that? Another photo featured an unidentified little girl sitting on a towel on the beach with the fruit in front of her. Could it be Kourtney's daughter Penelope, five?
Kourtney posted a snap of an unidentified little girl sitting on a towel on the beach.
She's reading a very grown-up book - The Power Of Now - which obscures her face and has a plate of fruit in front of her and her bucket for building sandcastles beside her.
Meanwhile, Kim took to her Instagram story on Sunday to post a video short of herself, showing only her feet, strolling down the same boardwalk that Kourtney had strolled earlier.
Something's afoot: It seems Kim Kardashian-West is at the same resort as her big sister. She shared a video of herself from the knees down on the boardwalk, saying, 'My office for the day.'
Lovely legs: The 37-year-old shared a stunning view of her pins and the Caribbean as she stretched out on towel
Bright toes: Kim shared this shot of her feet, captioned, 'Neon nails for vacay!!!'
The 37-year-old can be heard saying: 'My office for the day.'
In another vid she shows her legs as she lays back, taking in the beautiful view of the beach and the Caribbean.
Meanwhile it's a moot point whether Kim is with her family at the resort or joining Kourtney and Younes.
Tropical idyll: The five star Amanyara Resort on Turks & Caicos on the Caribbean
© Associated Newspapers Ltd.