If you thought that the Kardashians were one big happy family all day every day (isn't that what their constantly updated social media platforms suggest?) then you would be wrong. It seems that sibling rivalry is alive and well between the sisters with Kylie Jenner threatening to "stab herself" if Kim K were to move in with her.

Kylie JennerThe youngest of the Kardashian/Jenner klan does not want to live with her older sister, Kim

In a sneak preview of a new episode of Keeping Up With The Kardashians, the youngest sister had the opportunity to do pregnant Kim, 34, a favour by letting her, Kanye and two-year-old North stay with her.

Kylie, 18, has recently splashed out millions on a mansion in Calabasas and, as Kim’s property continues to undergo renovations, she hoped to borrow a room from her younger sister.

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But Kylie was having none of it.

She told her older sister: "I would seriously stab myself."

Kim responded with a plea. She said: "Come on Kylie, I would do that for you. I’m going to ask Kanye if he’s into that idea."

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But Kylie was not interested and said: "Nobody is staying at my house."

Kim - who is expecting her second child - was not happy with her sister.

She said: "I don’t understand why she’s being so rude and dramatic. She should want to cater to a pregnant woman."