There's no crying in parenting? Rob Kardashian gets a bit of a wake-up call when Scott Disick foists a bunch of unhappy children on him during Keeping Up With the Kardashians' season 12 finale on Sunday, November 20.

The E! unscripted series' preview clip shows Disick, 33, bringing the father-to-be to a day care center to help him prepare for the bundle of joy that Kardashian's pregnant fiancée, Blac Chyna, is expecting. (Kardashian and Chyna welcomed daughter Dream on November 10.)

"I wish I could say that only sometimes parenting was chaotic, but it's pretty much at all times, 24 hours a day — it's just difficult all around," the self-proclaimed lord tells the camera. "So I figure I'd bring Rob to a friend's day care center and see if he can really be hands-on when the kid is not plastic."

As the guys try to chat with the youngsters, a few of the kids start crying. One child even tries to run away from Kardashian, leading the 29-year-old Arthur George sock designer to admonish, "Where are you going? You can't go on the carpet with your shoes on. You got to take your shoes off."

Another scene shows the reality TV mainstay discovering that one of his charges has covered the bathroom floor with toilet paper, cotton balls and Q-tips. When the perpetrator starts to get emotional, Kardashian says, "Don't cry — you don't see me crying."

At that, Disick quips, "Get ready, Rob — this is going to be every day for the rest of your life."

Kardashian has shown some parenting skills in the past, with Chyna posting video to Instagram in August of him disciplining her son, King Cairo

Watch the clip above. Keeping Up With the Kardashians' season 12 finale airs on E! Sunday, November 20, at 9 p.m. ET. 

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