Kim & Khloe Shocked By Rob's Relationship With Blac Chyna: 'It Blows My Mind'

Rob Kardashian's relationship with Blac Chyna is nothing short of a "miracle" according to Khloe Kardashian — but it's not without some major family drama.

In a new preview clip from the upcoming episode of Keeping Up With The Kardashians, the 31-year-old marvels with sister Kim over their brother's newfound lease on life .

"Question," Khloe says in the clip, "Like, don't we kind of think it's a miracle that Rob, who doesn't even show up to Christmas for the past three years, literally he wouldn't leave his room, but the fact that now he's created a Snapchat, the fact that now he wants to be so public, blows my mind."

"She gave him confidence, more power to her," Kim, 35, replies. "After Rob and Blac Chyna started dating, Rob is now, like, all over social media and, like, out and about."

Of course, Rob's new romance is certainly a touchy subject for the Kardashian klan, as sister Kylie Jenner is currently dating Tyga, Blac Chyna's ex and baby daddy. To make matters worse, Rob and Blac are planning to walk down the aisle — and recently announced that they're also expecting a child together!

"He hasn't been like this in so long that even though there's been some drama," Kim added of her little brother. "If this is what it takes, then I don't care who he's dating. I'm just so happy that he's feeling better about himself."

Turning the whole thing into laughing mater, Khloe notes: "If some p**sy is getting him to remove his braces and shave his beard and work out..."

Meanwhile, as RadarOnline.com reported, Kylie has been "absolutely heartbroken" over the news of Rob and Blac's pregnancy.