Watch The Kardashian Sisters Almost Ruin Kimye's Engagement Surprise on Sunday's KUWTK

In part two of Keeping Up With the Kardashians, which airs this Sunday at 9pm, we'll get to see Kanye West's entire proposal to Kim Kardashian. But before we finally get to see him get down on one knee and present Kim with the mother of all diamond engagement rings, we'll get to see all the preparation involved in the proposal. Flying out the entire Kardashian/Jenner clan to San Francisco on a private jet, keeping the huge secret from Kim,  not ruining the surprise—it ain't so easy.

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So watch these three clips below of all the prep leading up to Kanye popping the question. First, here's the sisters coming up with a quick response to Kim's "What are you guys talking about?" question:

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Next, here's Kris, Rob, the sisters and Kim's friends on their private jet to San Francisco. Clearly Kris knows there's a proposal about to happen:

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And lastly, here's the sisters getting all glammed up while Kim, meanwhile, has absolutely no idea what's happening and almost cancels the whole night because she was sick!

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Be sure to tune into KUWTK to see the full proposal when it airs this Sunday, February 16 at 9pm on E!. Do you think Kim was expecting the proposal? What do you hope they show on the episode? Tweet us @OKMagazine.