Kim Kardashian West says Kourtney Kardashian "hated" being around children before she became a mother. The reality TV star, who has two-year-old daughter North, thinks her older sister, has changed a lot since having sons Mason and Reign and daughter Penelope. She said: "What's surprising is that in college, she was a wild party girl. She didn't like kids growing up. "She had a kid's clothing store and hated when kids came in. now she's the best mom in the world. "And as a new mom, I call her for everything." The star, who is set to give birth to her second child, a baby boy, with husband Kanye West in December, says she has become "more fearful" since having her daughter, but thinks Kourtney "is the bravest."