Reality TV star Khloe Kardashian is reportedly holding off divorcing her husband Lamar Odom because she fears he would take his own life if she did so.

According to TMZ, Kim Kardashian's younger sibling is scared that her estranged husband is fragile and officially ending their four-year marriage could push him over the edge.

The 29-year-old star allegedly believes that the basketball player, who is battling substance abuse, is capable of overdosing or committing suicide.

Sources close to the Keeping Up With The Kardashians star say she has put her life on hold while trying to work through her marital problems but now wants to put herself first.

A source told Radar Online that although Kardashian instructed her lawyer to draw up the divorce papers, she is not ready to 'pull the trigger.'

"All she needs to do is tell the lawyer to file the petition. She has even signed the divorce papers, in anticipation," the insider said.

The couple's marriage first hit the rocks earlier this year when it was claimed that Odom had cheated on his wife with several women.

In the latest episode of her E! reality show, Kardashian was seen discussing her marriage with Odom.

"There are some things that not everybody knows. Me and Lamar are the only two people who do need to know that," she said.

"Right now I'm in a place in my life where there are a lot of moving parts. Lamar doesn't know where he's going to play basketball and it's complicated.

"I'm not someone who really likes to, I guess, bore people with my problems," she said. "No-one really understands what someone's going through unless they walk a mile in their shoe."