Rob Kardashian just posted a shirtless photo of himself on Instagram.

Rob Kardashian Looks Bigger Than Ever During Late-Night In 'N Out Visit

After his siter Khloe proclaimed to Complex Magazine that he was going through a "hard time," the former Keeping Up With The Kardashians star returned to social media to post a "Throwback Thursday" photo, which featured him eating a sandwhich shirtless.

"Me just chill-zoning in Malibu eating a pulled pork sandwich," Kardashian wrote on Thursday, along with the "#TBT" hash tag.

Is Rob Kardashian's Weight Gain Jeopardizing His Health?

Just hours before his photo was shared, a snippet from Khloe's Complex interview was shared, during which she spoke of her brother, and joked about keeping him captive in her Los Angeles mansion.

"He's going through a hard time now," she confirmed to Complex, according to an Us Weekly report. "And [my home is] behind gates. With this crazy lifestyle you have to think of places where you can still have your freedom."

"I get crazy if he's like, 'I'm moving out,'" Khloe admitted. "Listen, he's a man and 28, and I'm sure it doesn't sound good to say, 'Oh I live with my sister,' but it's not because he has to. I'm like, 'Put this into perspective: Your friends live at home with their parents because they can't do anything else. Your sister’s literally holding you captive and actively making you. So if that makes you feel better, say that all you want.' I don't want to put words in his mouth, but I'm sure that's why he would threaten to move out."

Tags: Khloe Kardashian rob kardashian Keeping Up With The Kardashians E! Reality TV