Seth Browarnik/Startraks
August 13, 2009 05:00 PM

Kourtney Kardashian wasn’t the only person shocked by news of her pregnancy – younger sister Kim Kardashian was also surprised.

“I don’t think she’s envious,” Kourtney said of Kim on Ryan Seacrest‘s 102.7 KIIS-FM radio show Thursday morning. “Who knows though – Kim gets mad if I get the car that she wants she like freaks out! [But] she definitely thought it was going to be her first, trust me.”

The Keeping up with the Kardashians star, 30, who’s expecting her first child with on-again boyfriend Scott Disick at the end of the year, says she hasn’t picked out any names yet – but already has some choices, thanks to younger sisters Kendall and Kylie, who have lists.

As for how the dad-to-be is holding up, Kardashian says Disick is “excited, but I think he has his moments where he’s really scared.”

“He was way more excited than I was,” she adds. “He definitely wasn’t as nervous or scared [as I was, but] then I think once I was fine with it, then he gets scared.”

Kardashian – who says it’s still weird to say she’s pregnant – has been hiding her burgeoning belly by wearing “jeans I can’t button and a big shirt,” and knew she was expecting when her body and appetite began to change.

“[My breasts] were so sore,” she says. “I would get really lightheaded and I got nauseous. I would get nauseous at nighttime. I would have to eat Saltine [crackers] at all times of the day.”

As for having an unplanned pregnancy she says, “This sounds probably so dumb but there’s so many times I’ll forget to take my pill and just don’t think it’s that big of a deal,” Kardashian admits. “I’ve done that several times and never really thought about it. It sounds so stupid.”

Will she and Disick be tying the knot any time soon? “I don’t know,” she says. “We’ve talked about it but I feel like there’s so much going on that I can’t even go there.”

VIDEO: Watch Kourtney & Scott’s rollercoaster romance!
Think you know the Kardashians? Find out in Hollywood Hangman!

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