Rob Kardashian admits childhood crush on his sister!

We all know how close the Kardashians are but this takes things too far.

In the video teaser above for Rob & Chyna, Rob Kardashian admits his sister Kimmy K was his childhood crush!

No joke.

The soon-to-be daddy appears in the E! News clip with his fiancé Blac Chyna discussing their first crushes.

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"Her childhood crush was Ricky Martin," the 29-year-old tells us in the clip.

"Yeah," Chyna confirms before doing a little boogie to the Puerto Rican’s hit Livin La Vida Loca.

Chyna then takes a dig at Rob, revealing that his former crush was "J.Lo!"

"That's pretty accurate," Rob confirms.

"J.Lo and Kim Kardashian…. " Chyna adds. Waaaa?

"That is also pretty accurate," Rob says as he blushes.

Did you seriously just admit you had a thing for you sister? Sorry Rob but that’s just gross!

Whether the sock designer said that for some media attention or was telling the truth, either way, you don't say things like that dude!

Despite just admitting to his future wife that he once had a fetish for his sister, it seems the pair are going strong amid breakup rumours.

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