The 32-year-old NBA star's drug use and the accusation that he cheated on the reality TV star is said to have caused trouble in his marriage to the socialite, 29, reported People magazine.
Odom's drug usage has often made headlines. He violated NBA drug policies twice in eight months back in 2001, and spoke in 2003 of his marijuana use.
Khloe was keen on helping her husband who did not show much interest in the beginning.
Khloe was said to be relived when she learnt that Odom has finally gone to a rehab.
"(She is) relieved that Lamar has finally gone to rehab, if that's where he really is. She has stood by him for the past two years as he descended into a nasty addiction of Oxycontin and cocaine," a source said.
