Rob Kardashian Lovingly Scolds Blac Chyna's Son King For Saying 'Sh*t': 'That's a Bad Word'

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Sometimes “sh*t” happens, and when it does, Rob Kardashian is there with a scolding.

In a new video posted to Blac Chyna's Instagram on Saturday, the 29-year-old reality star is seen reprimanding Chyna's son, King Cairo, for his potty mouth.

WATCH: Rob Kardashian's New Neck Tattoo Might Be of Blac Chyna's Name

"Sh*t," King repeats several times as he grabs a hold of a phone and hides under a bed.

"What did you say?" Kardashian asks when he finally finds the toddler.

"I said sh*t!" the 3-year-old responds.

"No, you can't say that," the father-to-be says, practicing his parenting skills. "Don't say that. That's a bad word. Mommy's going to get really mad at you."

"But I can say sh*t!" King pushes, before Kardashian gets the last word.

"No, you can't say that."

WATCH: Kourtney Kardashian Sympathizes With Rob After Huge Fight Over Blac Chyna: 'It Took Years For People to Like Scott'

"I've had this video for a min & it cracks me up!" Chyna captioned the video on Instagram. "Ive been hesitant to post it because I know the media would make it something it's not. But Idc it's too funny."

"My favorite part is when Rob jumps out," she continued. "Look at his face. But overall I'm so happy & blessed to have Robert here willing to help teach King right from wrong."

While Chyna's clearly thrilled to have Kardashian involved in her son's life, he's not the only member of the famous family she trusts with her child.

WATCH: Blac Chyna Goofs Off With Rob Kardashian on Snapchat, Jokes ‘Are You Still Texting B**ches’?

In a recent Facebook Live video, the couple dished on who they'd let babysit their new baby, between Kendall and Kylie.

"I'd probably let Kylie babysit," the Arthur George designer said.

"Yeah, she can babysit the baby and King at the same time!" Chyna agreed.

To hear more from the pair's Facebook Live chat, including details about their wedding and how many kids they want, watch the video below.