Kourtney Kardashian is pooshing back the curtains on her family's dynamic.
As her notoriously private brother Rob Kardashian made a rare appearance on The Kardashians, the Poosh founder detailed how she, Khloe Kardashian and Kim Kardashian each have a different type of relationship with the 38-year-old.
"Him and Khloe are a little incestual," the eldest of Kris Jenner and the late Robert Kardashian Sr. joked during a confessional on the Oct. 30 episode of the Hulu series. "Him and Kim are like the husband and wife that hate each other."
As for herself? The 46-year-old said she and Rob are "super close friends."
"At one point, we would go out together, hold hands, just have so much fun together," Kourtney quipped. "I love having him around."
But opportunities for fans to keep up with Rob are few and far between. After all, he stepped away from reality TV in 2017 after welcoming daughter Dream, 8, with ex Blac Chyna.
“I don’t wanna be filming and putting myself in a position where I’m not comfortable,” Rob explained on a July episode of his sister's Khloe in Wonder Land podcast. “I’m not comfortable in my skin, so why would I want to go be on camera and just be vulnerable and let people in when that’s not what I want to do?”
But the Rob & Chyna alum emphasized that his decision to stop filming with his family had nothing to do with his sisters—including Kendall Jenner and Kylie Jenner—or their mom.
“There’s definitely nothing wrong between any of us,” he noted. “It just has everything to do with myself.”
That's why Rob hasn't exactly ruled out a full-time comeback on The Kardashians.
“I love filming if it’s positive and natural and I’m feeling good about myself,” he added. “I like being around my family so that stuff is good to me."
New episodes of The Kardashians air every Thursday on Hulu.
For a look at Rob through the years, keep reading...
The Youngest Kardashian
Kris Jenner welcomed her only son and youngest child with Robert George Kardashian, named Robert Arthur Kardashian, on St. Patrick's Day in 1987.
Twinning With Dad
Robert and Rob couldn't look more alike in this throwback snap.
Big Smiles
A bleach-blonde Rob smiles from ear-to-ear for a photo with sister Kylie Jenner.
Best Friends & Siblings
As you can see from this vintage pic, Rob and sister Khloe Kardashian have always been close.
Inseparable Siblings
Rob and Khloe pose for another sibling snap
Tropical Fun
Rob enjoys crystal clear water while abroad.
Family Night Out
Rob joins mom Kris, sisters Kim and Khloe on the red carpet at the Kardashian Charity Knock Out at the Commerce Casino in November 2009.
Sin City Squad
For Kim's birthday in 2010, she and her siblings Rob, Khloe and Kourtney Kardashian hit up the TAO Nightclub in Las Vegas.
Supportive Sister
Khloe supports brother Rob at the 2011 BBVA NBA All-Star Celebrity Game in Los Angeles, Calif.
Young Love
The Keeping Up With the Kardashians alum plants a kiss on then-girlfriend Rita Ora.
Cute Couple
Rob receives a sweet touch from Rita in this black-and-white photo.
Solo Shot
Rob beams with pride in this solo shot from his Arthur George launch at Neiman Marcus.
Red Carpet Moment
Rob and sister Kim hit the red carpet at the World's Most Beautiful magazine launch event at Drai's Hollywood in August 2011.
Work Event
The Keeping Up With the Kardashians siblings attend the E! 2012 Upfront in New York City.
Birthday Boy
Rob rings in his 26th birthday at the 1 OAK Nightclub at the Mirage in March 2013.
Beachside Snack
Rob enjoys a pulled pork sandwich in Malibu in this #tbt from 2015.
Nap Time
Khloe and Rob catch some Zzzs in this Instagram photo.
Bonding With Kylie
Kylie and Rob spend some quality time together.
Rob & Chyna
After three months of dating, Rob and Blac Chyna announce their engagement on April 5, 2016.
Date Night
Following their engagement, Rob and Chyna step out for his birthday at the Hard Rock Cafe in Hollywood on May 10, 2016.
Baby on Board
In May 2016, Rob and Chyna announce they're expecting a baby together. The twosome reveal they are having a little girl in September 2016.
Baby Dream
Rob and Chyna welcome daughter Dream Kardashian on November 10, 2016.
Kisses for Dream
Rob shows love to his infant daughter Dream.
Fun in the Sun
The father of one watches over his little one as he helps her float in the pool.
Water Time
Dream looks comfortable in the water in this snap with her father.
Quality Time With Lovey
Rob's mom Kris, known as Lovey to her grandchildren, spends quality time with baby Dream.
Disney With Dream
Dream's parents give her a magical day at Disney, including a moment with Minnie Mouse! Rob and Chyna break up in 2017.
Daddy's Girl
Dream can't stop giggling as dad Rob lifts her in the air.
Father & Daughter
The super private star proudly holds up his only child.
Happy Halloween!
Dressed as a character from Trolls, Rob poses for a Halloween photo with mom Kris in 2019.