The Kardashian sisters are not condoning their brother's behavior.
Khloe Kardashian gets heated over Rob apparently going MIA on his pregnant fiancee, Blac Chyna, in a clip from this week's Keeping Up With the Kardashians, telling Kourtney and Kim, "If this was any man that we were with, we'd be pissed."
"He hasn't spoken to her in days, how dare you leave a pregnant...," the 32-year-old reality star says, trailing off. "I don't give a f**k."
WATCH: Kim Kardashian Calls Brother Rob a 'Lunatic,' Says His and Blac Chyna's Relationship Is 'Unstable'
"Would you be happy with Kanye if he disappeared for five days, and he never reached out to you?" Khloe asks Kim, who responds, "No, I'd die."
"Rob is going to be a dad and he has a family to answer to," Khloe explains in an on-camera confessional. "So I feel like now more than ever, Rob can't handle things the way he once did."
WATCH: Rob Kardashian Opens Up About Fighting With Blac Chyna in New 'KUWTK' Promo
The turbulence between the parents-to-be is a major focus this season on the reality show. On a recent clip, Kim argues, "Rob and Cyna have an unstable relationship."
Watch the video below for more.
Keeping Up With the Kardashians airs Sundays at 9 p.m. ET/PT on E!