The mother of one said she makes sure that her one-year-old daughter North West sleeps in her own cot, reported Ace Showbiz.
"I am a strict mother. I'm really fun and playful, but I'm really strict on nap time, and sleeping in her own crib.
"Like Kourtney's style is where her kids sleep in bed with her, so especially with the third baby coming - they're going to need a bigger bed or they're going to need some other rules. And maybe on weekends, (North will) come and sleep in the bed with us. But... I'm not crazy strict."
The 'Keeping Up with the Kardashians' star said she wanted to give her daughter a little brother or sister, but she did not want to have too many kids.
"I hope so. I grew up with a lot of siblings so I know what that's like," she said.