On Sunday's Keeping Up With the Kardashians, Kris Jenner accidentally walks in on Scott Disick "butt naked" - and tells all to daughter Kim.

Did she stare or run the other way, Kim, 29, asks her mom (see video above).

"I ran the other way!" Kris exclaims.

"I can't believe I saw Scott's penis!" she later says. "I'm, like, traumatized!"

Watch a new episode of Keeping Up With the Kardashians Sunday at 10 p.m. (EST) on E!