West's 'jealous' daughter North having trouble accepting that ...

and her third husband Kanye West's eldest daughter North is still having trouble accepting the fact that she has a brother Saint, 2; and sister Chicago, 9 months.

'North acts like an only child at all times. I think she's a little confused,' the 37-year-old KUWTK reality star said on Ashley Graham's podcast Pretty Big Deal on Tuesday.

'She's beyond jealousy now. She's just like, "It's my world." She said to me the other day, "Mom, we just need to have another baby brother so that Saint can just leave me alone. So the girls can be on this side of the house and the boys can be on that side of the house."' 

'North acts like an only child at all times': Kim Kardashian and her third husband Kanye West's eldest daughter North (R) is still having trouble accepting the fact that she has a brother Saint, 2; and sister Chicago, 9 months (pictured April 23)

'North acts like an only child at all times': and her third husband Kanye West's eldest daughter North (R) is still having trouble accepting the fact that she has a brother Saint, 2; and sister Chicago, 9 months (pictured April 23)

The 37-year-old KUWTK reality star said on Ashley Graham's (R) podcast Pretty Big Deal: 'I think she's a little confused. She's beyond jealousy now. She's just like,

The 37-year-old KUWTK reality star said on Ashley Graham's (R) podcast Pretty Big Deal: 'I think she's a little confused. She's beyond jealousy now. She's just like, "It's my world"'

Kim's five-year-old princess - nicknamed 'Thrilla' - made her runway modeling debut on the catwalk of the L.O.L. Surprise presentation in Palisades Park on September 22.

'She has a sign on her door that says, "No boys allowed,"' the wrongful incarceration advocate added.

'She won't even let Saint step foot in her room. If he does or if he's with me and I have to take care of both of them, it's like full war.'

Kardashian then gushed that her son was 'the nicest human being on the planet' and the boy recently told her 'Mom, you're my best friend.'

Kardashian continued: 'She said to me the other day,

Kardashian continued: 'She said to me the other day, "Mom, we just need to

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