While Rob Kardashian's family may have gotten over his unexpected proposal to Blac Chyna now that the couple are expecting their first child, it seems Kris Jenner had a really big problem with the engagement when she first found out about it through social media.

In this clip from the upcoming episode of "Keeping Up With the Kardashians," Jenner discovers that her 29-year-old son popped the question without ever telling his mom about his intentions.

WATCH: Rob Kardashian and Blac Chyna Get Their Own Reality Series

"I guess Rob got engaged last night," Jenner says to her friend, Sheila Kolker, clearly stunned as the two wander around a clothing store.

"I wake up to a gazillion text messages, which is never good news. And I'm reading through them and realize Rob got engaged last night, he got engaged!" Jenner shares with the "KUWTK" cameras. "And it's sorta coming out of left field. I think I'm just in shock."

WATCH: Rob Kardashian Proposes to Blac Chyna While Entire Kardashian Family Is Out of Town

Speaking with Kolker, Jenner revealed that her son asked Blac Chyna's mom for her daughter's hand in marriage, but "never even mentioned it to us."

"He should have called me," Jenner lamented, growing emotional. "I didn't do anything to him. Except give him an amazing life."

Kardashian proposed in April while his sisters were on vacation in Vail, Colorado, causing a great deal of discord when his family found out about the engagement the following day.

WATCH: Kim Kardashian Says She ‘Could Care Less' About Rob’s Engagement to Blac Chyna on 'KUWTK'

"To hear that Rob got engaged through social media is a bit disappointing to say the least," Jenner shared. "He should've told me first or even talked to the family about it or mentioned it to his sisters, but I had no idea."

A month after getting engaged, Rob and Chyna announced that they were expecting their first child. Apparently, the news of a brand new bundle of joy brought Jenner around, and she's reportedly "thrilled" about her forthcoming grandchild. Check out the video below to hear more.

"Keeping Up With the Kardashians" airs Sundays on E!