Kim Kardashian was accused of trying to ‘outshine’ Kourtney with the photo she shared for her older sister’s 45th birthdayCredit: YouTube/eentertainment

She faced backlash after sharing this photo from their Turks and Caicos getawayCredit: Instagram/KimKardashian

In the photo, Kim stood slightly away from her sisters and pouted at the camera while flashing a peace sign with her arms wide open.

Khloe stood with her arm around Kourtney, smiling at the camera, while Kourtney had her eyes closed and looked slightly blurry as if she was mid-action.

“Happy Birthday Queen Kourtney Kardashian,” Kim captioned the post on Instagram on her sister’s big day on Thursday.

“There’s no one on this planet that I have spent more time with and have all of the same memories with growing up than you and I cherish them all.

“Sharing a room and friends and cars and our lives together for four decades has been the most magical journey to have you by my side. I love you and I can’t wait for another 45 years together!

“Celebrating you today and grateful to you forever for always giving the best advice a sister could possibly give!”

Critics in the comments called Kim out for picking a photo where she stood out the most – but said Kourtney still “looked the best.”

“Of course she would post a picture where she looks good and outshines Kourt,” one wrote.

“Jokes on Kim cause I actually think Kourtney looks the best here… most natural,” another added.

“Can we talk about how good Kourtney looks though! Four kids later and naturally showing it off,” a third posted.

“Kourt looks so fire postpartum!!!” a fourth commented.

“I think Kourtney looks absolutely gorgeous yay for her looking real!!” someone else wrote.

Kourtney waded into the comments herself to clap back at a troll who claimed it was an unflattering photo of her.

“I LOVE this photo! It is me and my sisters having the best time on a trip with our kids… and the memories to last forever,” she raged.

Your body is beautiful at all stages. The pressure put on us to bounce back [after giving birth] isn’t realistic

Kourtney Kardashian

“And I love this body that gave me my 3 big babies and my little baby boy.”

Kourtney welcomed her fourth child, son Rocky Thirteen, in November with her husband, Travis Barker.

The Poosh founder also has three kids with her ex, Scott Disick – Mason, 14, Penelope, 11, and Reign, nine.

Last week, she talked about the “unrealistic” pressure to “bounce back” with her post-partum figure.

She addressed the note to “new mommies” and wrote, “Your body is beautiful at all stages.

“During pregnancy as we are glowing and growing, postpartum as we are healing and shrinking, and then that period I find the hardest as our bodies are still adjusting.

“And if you’re breastfeeding, that’s a whole other part of it. I try to be kind to myself as my body finds a new normal.”

“The pressure put on us to bounce back when everything is new and different isn’t realistic,” Kourtney went on.

“Life is beautiful, you are beautiful. Just a little reminder (for me too).”

Kourtney, pictured with her husband, Travis Barker, turned 45 on ThursdayCredit: Instagram/kourtneykardash

Kourtney welcomed her son, Rocky, in NovemberCredit: Instagram/travisbarker

Kourtney recently called out the ‘unrealistic’ pressure to ‘bounce back’ with her postpartum figureCredit: Instagram/KourtneyKardashian