Kourtney Kardashian might be ready to pop, but the season finale of Keeping Up With The Kardashians is slated to reveal Scott Disick's reaction to Kardashian's pregnancy with their third child.

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In the short sneak peek Kardashian is packing for a family trip and Disick walks in.

Interestingly enough, he sees the amount of clothes his longtime girlfriend is tucking away and asks, "How much clothes does a little kid need?"

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Kardashian takes the opportunity to reveal to him that she's expecting. She asks him to close the door and it seems like he's a little nervous of what might happen next as he takes his time.

She says with a smile, "I just wanted to tell you. That I am pregnant."

Disick is definitely speechless as he starts to trip over his words and can't really express his thoughts clearly.

He says, "I thought... Uh..."

He quickly gives up and remains speechless.

News that Kardashian, 35, is pregnant hit the Internet in earlier this summer.

An insider confirmed it to People on June 4 and said, "She's really excited but she's nervous too. Three kids is a lot to handle! But she's happy - she's always wanted a big family with Scott."

Disick, 31, and Kardashian have two children, 2-year-old Penelope Scotland and 4-year-old Mason Dash.

Check out the two night season finale of season 9 of Keeping Up With The Kardashians on Sunday and Monday at 9/8c on E!

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Keeping Up With The Kardashians, Reality TV, E!