But last night’s season premiere of series 18 of Keeping Up With The Kardashians saw their feud taken to a whole new level.
KKW Beauty mogul, Kim, 39, slapped her sister Kourtney, 40, several times after Kourt launched a verbal attack at Kim.
Mum-of-three Kourt screamed: “I will f**k you up!” towards her younger sister.
Their explosive fight came after Kim slammed Kourtney’s work ethic and later accused her of “not caring about stuff”.
Kourtney recently revealed she was taking a step back from filming their hit show in order to live a more “fulfilling” life.
Offended by Kim’s remark, Kourtney hit back: “I will literally f**k you up if you mention it again.
“Shut the f**k up and don’t laugh like that, you look like a freak!”
She went on to say: “If I didn’t want to work my a** off and I wanted to be a stay at home mom, that’s f*****g fine you f*****g literal a**hole.”
In a more abrupt manner, Kourtney went on to square up to Kim before throwing a water bottle at her and pushing her to the ground.
Stunned, Kim hit out saying: “Don’t ever come at me like that again I swear to go I’ll punch you in your f*****g face! Don’t f**k with me.”
Fans instantly took to Twitter after the fight with one saying: “This fight was long overdue #KUWTK.”
While a second went on to pen: “I 100% see why Kim gets so annoyed with Kourtney #KUWTK.”
A third Keeping Up viewer said: “Kourtney is so negative. Like you had a choice not to be on this season. Why are you filming if you don’t want to be there?!”
After their fight was separated by Khloé Kardashian, Kim noticed she had battle wounds on her arm, chasing Kourtney shouting: “Don’t ever dig your f*****g nails in me like that! How old are you? How f*****g old are you?”
Well, season 18 seems to be going down a storm!
Stream Keeping Up With the Kardashians in the UK on hayu today.
KUWTK airs on E! on March 29th.