Pregnant Kourtney Kardashian Thought Kim Would Be A Mom First

'Kim has, like, every baby name picked out,' the 'Kourtney & Khloé Take Miami' star tells Ryan Seacrest.

No one was more surprised about Kourtney Kardashian's pregnancy than Kourtney herself, who always thought sister Kim would be the first mom in the group.

"She definitely thought it was going to be her first. Kim has, like, every baby name picked out," Kourtney said on Ryan Seacrest's KIIS-FM morning show on Thursday (August 13), Us Weekly reports. "I don't think she was envious, but who knows? Kim gets mad if I get, like, the car that she wants. She, like, freaks out.

"Out of all of us, I was definitely the last one that was even thinking about it," the "Kourtney & Khloé Take Miami" and "Keeping Up With the Kardashians" star added.

Kourtney is expecting the baby, due in December, with boyfriend Scott Disick. When she found out she was pregnant while shooting her reality show in Miami, she was "so nervous." And stepdad and Olympian Bruce Jenner didn't help calm her nerves.

"[He said], 'You guys are acting like you're getting a little puppy dog!' " she recalled. " 'You need to take this seriously.' ... He freaks me out the most."

Now five months pregnant, Kardashian admits that the baby was unplanned. "This probably sounds so dumb, but there's so many times I'll forget to take my pill, and I don't think it's that big of a deal," she said. "It's just so stupid."