Reality Tv star Kim Kardashian has accused her estranged stepmother of trying to destroy her close-knit family by spreading child abuse and adultery lies about her mum Kris Jenner.

Robert Kardashian's widow Ellen allowed 24-year-old journal entries, allegedly written by her late husband, to be published in In Touch magazine this week (begs21Jan13), and the damning excerpts paint Jenner in a bad light as a mother and a cheating wife.

One of the diary excerpts reads: "Kris couldn't get her act together (to spend Christmas with her children). I was home alone with 4 kids."

Robert also alleged Kris abused Kim, writing, "Kris was kicking and beating her and said she was going to kill (Kim)! Kim was hysterical."

Jenner's publicist shot down the sensational claims when the reports first surfaced on Wednesday (23Jan13), and now Kardashian has waded into the controversy.

In a series of posts on Thursday (24Jan13), she writes, "So my dad's ex is selling ridiculous stories again to tabloids! Do not believe it! Sad when people need $ (money) & get desperate. 10 yrs (years) since dad passed &this woman he married 4 2 wks (weeks) before he died needs 2 get a job instead of trying 2 destroy families w (with) fake stories... Ps that story that my mom beat me & threatened to kill me hahahhahaha! I'd beat her! Jk (joking) truly laughable! Nottrue (sic)".

The sexy socialite, who is expecting her rapper boyfriend Kanye West's child, has also tried to put a stop to speculation suggesting her sister Khloe is jealous of Kim's pregnancy after struggling to conceive with her husband, basketball star Lamar Odom.

Kim continues, "These ridiculous stories of Khloe are complete Bs (bulls**t)! She isn't preggo (pregnant), she's so happy 4 me, her & Lamar r perfect... (sic)".

And the Tv regular admits she's sick of addressing tabloid lies, adding, "Prob (probably) done responding to fakeness for a while but I knew this weeks stories hurt my mom & I will set record straight 2 protect her (sic)!"

Robert Kardashian divorced Kris 13 years before he lost his battle with cancer in 2003. She has been married to former Olympian Bruce Jenner since 1991.