Kourtney Kardashian: I am nervous about being a good mom

Talk about a dose of reality! Kourtney Kardashian moved to Miami earlier this year to film a show, Kourtney & Khloé Take Miami, about her and her younger sister as sexy singles in the city. But by the time they made the trek back to LA, Kourtney was carrying a little extra baggage. "It wasn't something I expected or planned," Kourtney tells Life & Style in an exclusive interview. "It was just meant to be."

Now eight months into the pregnancy, Kourtney, 30, is eagerly preparing to welcome a bouncing baby boy with her on-again, off-again boyfriend, Scott Disick, 26, in December. "My pregnancy has been wonderful," she gushes. "I love being pregnant. I'm excited to be a mom -- but I'm nervous." And viewers will get to see her take on the new role -- and maybe even get a peek inside the delivery room -- during season four of Keeping Up With the Kardashians. What they won't see, however, is Kourt complaining about her burgeoning belly. "I'm totally excited to gain weight, and I'm embracing it," she tells Life & Style. "I run around naked all day at home! I like that my body is changing. It's a beautiful thing."

And like a good teammate, Scott's making every effort to redeem himself in the eyes of Kourtney's family. In the past, she's accused him of cheating, which he adamantly denies. "Scott and I have been going to different parenting classes," Kourtney tells Life & Style. "They made me nervous at first, putting all kinds of information into my head, but they're helpful. They're a fun thing for Scott and me to do together." But being a perfect father doesn't mean Scott will necessarily make Kourtney an honest woman. "I'm 30, but I never was that girl who was like, 'I need to get married,'" she says. "I never had a plan. Now I have so much to think about for the baby. I'll worry about myself later."