Kourtney Kardashian has been criticized by some fans for her latest Instagram post.

The 42-year-old reality star straddled boyfriend Travis Barker while wearing a nude thong bikini. The desert background showcased the sights of the exclusive Amangiri resort in Canyon Point, Utah.

Kourtney wore a tiny two piece nude bikini as Travis went shirtless in the desert. The Poosh founder wrapped a cream colored scarf around her head and let her long brown hair catch the wind.

Travis showed off his incredible array of tattoos while carefully holding his girlfriend in his arms for the photo shared for her 117millllion followers.

Kourtney captioned the snap "Just Like Heaven" while Travis shared the photo on his Instagram stories, along with a Spotify snap of The Cure's song of the same name.

The pair also showed fans on social media that they were enjoying a game of Scrabble. The loved up pair seemed to be playing a sexual take on the game, as they spelled out words such as "orgasm."

Another row showed "vegan, girl, raw, coils and oh" spelled out across the grey marble countertop.

Kourtney and Travis were enjoying an extended birthday celebration at the luxury digs, where the two-bedroom Mesa Pavilion costs up to $12,000 per night. Kourtney turned 42 on the 18th of April.

"Travis adores Kourtney and makes every day special, especially her birthday. He has gone all out to shower her with love, affection, flowers and gifts," a source close to the couple told E! News.

But some fans were not impressed by Kourtney and Travis' romantic display - with many citing the pair's small children as their reasoning.

"Shall we start a GoFund me for the therapy that her kids are going to need after seeing this on social media and then being teased about it...unreal," one fan wrote online.

"Her poor kids... especially that older son," another added.

"Her kids must be so proud. Where are they whilst these photoshopped snaps are being caught," a shady comment read.

Earlier this month, the reality star took to her Instagram stories to post a link to her latest article on her health and wellness website Poosh.

The mom-of-three shared a picture of woman's private region, with the caption: "Rough sex: Love it or leave it?"

The following article went on to call out to those with "kinky preferences" in the post that came after Barker, 45, marked Kourtney's birthday.

The title of the article read: "What Does It Mean When Someone ENJOYS ROUGH SEX?" and detailed how sexual preferences transcend into real life.

Related: Travis Barker Fans Tell His Ex-Wife To 'Get Over It' After She 'Slams' His New Love

Kourtney and Travis also hinted about their love life after they celebrated the mom-of-three's birthday recently.

On Instagram, Barker shared a number of sexy snaps of his lady love. One picture showed his tattooed hands around the lower waist of his Keeping Up with the Kardashians girlfriend, as she wore a two-piece black swimsuit.

The new couple, who share five children between them, have been linked since February.

Related: 'KUWTK': Kim Kardashian Takes The Show Full Circle With Updates About Shorty

"I F***ING LOVE YOU! YOU'RE A BLESSING TO THIS WORLD HAPPY BIRTHDAY @kourtneykardash," Barker captioned the slideshow.

The drummer's first image showed him holding the POOSH founder as they passionately kissed while she sat on his lap.

But it was the video Travis shared in his collection of images that shocked fans.

The "What's My Age Again?" artist added in a wild clip of the reality star sucking on his thumb.

He taped the intimate moment with Kourtney as the camera flashed in her face and she laughed, saying: "Travis!"

Next: KUWTK' : Kim Kardashian Takes The Show Full Circle With Updates About Shorty