Kendall and Khloe called the Kardashian-West "skinny" and said that her "waist and hands in the sun".
Khloe said: "I think she knows that, if I have been away because when I come back, she gets so excited to see me - that just no matter how exhausted you are after work or whatever, it melts your heart".
Taking to Instagram yesterday, Kylie also posted some shots from the photoshoot revealing it took place just three weeks after she gave birth.
"Honestly, I think it's ongoing", the star said.More news: Chelsea vs. Manchester City - Football Match Report
If you look closely at Kourtney in the back, it appears her forearm on the left is rather skinny compared to the right side.
And Kim Kardashian fired up her Insta Stories of a Thursday to show herself spending some quality time with her middle child.
The 15th season of KUWTK premieres this Sunday night on E! at 9 p.m.
She doesn't care about me.
The 34-year-old Keeping Up With The Kardashians reality star was joined at the event by her co-founder Emma Grede as they celebrated their line launch, which keeps with Good American's size-inclusive ethos, fitting sizes XS through 4XL.More news: Elderly men escape nursing home for German heavy metal festival
Kourtney throws a haymaker right a back as she gets personal by saying: 'You're a very distraught, evil human being.
"What Kim doesn't seem to understand is that Kourtney is done living this Kardashian life".
Khloe opted to stay with Tristan, and her older sister Kim - who has North, five, Saint, two, and Chicago, six months, with her husband Kanye West - has said the whole family is on board with her decision, as long as she's happy. She was born in April this year. Family memories we were creating. You just love every minute of it.
Oh word, did Kourt tell you this?
"As you'll see from the high-res version of the image, there are no issues with Kourtney's arm", Calvin Klein, Inc. wrote in a statement provided to INSIDER.More news: Klopp applauds Alisson after solid debut against Napoli