KHLOE Kardashian has reportedly told Lamar Odom she wants a divorce.
The 'Keeping Up with the Kardashians' star, who kicked her husband out of their house in Tarzana, California, in August after a failed intervention to get him to go to rehab, allegedly informed him on their fourth wedding anniversary last Friday (27.09.13) that she is preparing to file papers to formally end their marriage.
A source told Us Weekly magazine: "She called him on their anniversary and told him she'd be filing for divorce. She wanted to give him fair warning. Khloe was very firm. She said she will be filing soon and she thinks it's best they move on.
"Khloe told Lamar she hopes he gets the help he needs."
Khloe recently changed her name on her Instagram and Twitter profiles by removing her last name Odom.
The insider said: "Changing her name on social media was a big step in letting people know she is moving on."
Another source said that Khloe, 29, is still trying to get the basketball star, 33, to seek help even though she believes their relationship is over.
The friend said: "She thinks he needs to be treated for this disease. (She) is really worried about his well-being and is afraid of what will happen to him."
Lamar, who is allegedly addicted to crack cocaine, was accused of cheating on Khloe with several women earlier this year but she has stuck by him until now and has continued to wear her wedding ring.
Kim Kardashian has reportedly urged her sister Khloe to end her marriage to Lamar because his bad reputation is tarnishing their family name and destroying their empire.
A source told RadarOnline.com: "Khloe was at 'momager' Kris Jenner's house, and Kim just hit into her about how much Lamar was hurting their bottom line and creating so much negative publicity."
Khloe, 29, reportedly issued Lamar with an ultimatum last week, stating that he either goes to rehab or she will be filing for divorce, but Kim - who welcomed her daughter North into the world with boyfriend Kanye West in June - believes Lamar has had too many chances.
The source explained: "Kim can't understand why Khloe hasn't dumped Lamar because he is showing absolutely no desire to go to rehab.
"The headlines surrounding Lamar's womanising and drug addiction are tacky according to Kim, and she doesn't want to be associated with it. Khloe has maintained that she isn't ready to pull the plug on their marriage.
"The last thing Khloe needs is her family turn on her. Khloe left the house in tears."
However, Khloe is refusing to take advice from Kim after she called time on her marriage with ex-husband Kris Humphries after just 72 days with no repercussions, and she would rather her family were supportive of her decisions.
The source said: "It's no secret that their mother, Kris, plays favourites, and Kim can do no wrong in her eyes."