On Sunday's Keeping Up With the Kardashians, Kris learns her son proposed to his girlfriend Blac Chyna without telling her about it, which she admits is "disappointing."
"I guess Rob got engaged last night," Kris tells her friend Sheila Kolker in the clip above.
"Are you alright?" Shelia asks.
"No, but that's why we're just wandering," Kris tells Sheila.
Kris then explains, "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! And it's sorta coming out of left field, I think I'm just in shock."
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Rob didn't tell any of the Kardashians that the engagement was happening, so they're all surprised when they hear the news.
"He asked for her mom's hand in marriage," Kris tells Sheila. "And he's never even mentioned it to us."
She then says, "To hear that Rob got engaged through social media is a bit disappointing to say the least. 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."
Take a look at the clip above to see what else Kris said about Rob and Blac Chyna's engagement and find out if she's going to call him!
Watch brand new episodes of Keeping Up With The Kardashians Sunday at 9e|6p, only on E!