Brody Jenner walked in on an almost-naked Kim Kardashian during Sunday's episode of "Keeping Up with the Kardashians."

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Jenner and Kardashian were both in Thailand with the rest of the family in the last episode of the E! Entertainment reality series. But the step siblings had an awkward encounter when Jenner stepped into Kardashian's room and saw her in a barely-there dress while she posed for a racy set of pics for her husband Kanye West.

"What are you doing?" Jenner says as he catches a glimpse of Kardashian covering her privates. "Oh my God!"

After the incident, Jenner walked over to his brother Brandon Jenner's room and explained the situation to both him and his wife Leah.

"I just came around the corner and Kim's assistant was taking photos of her while she was in this see-through white, ass out, coming through the top -- the whole nine, and I just fully walked in on it!" he said looking flustered.

"You just saw Kim naked?" Leah asked him. "Brody, did you get turned on by Kim?"

"Well, maybe just a half-chub" Jenner joked.