Apparently there's a good reason why Lamar Odom has been so grateful to his ex-wife Khloe Kardashian during these last few months of his life. Sources say that the former NBA star has no option but to rely on the reality star as he has no one else that's close to him in his life.

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According to Xpose on Friday, Lamar has steadily been making progress after nearly overdosing during a three-day drug binge at a Nevada brothel back in October. His ex-wife has been by his side ever since as she's been not only making important medical decisions for him, but also helping look after him as well as he continues to walk and talk on his own.

A source close to the ex-couple said, "He can move around alone, and he can communicate much better. In the beginning, he couldn't talk at all. He knows how much Khloe has been there for him, and he is so grateful. The therapy can be incredibly frustrating and he has hard moments, but Lamar is a former athlete. He's strong. And he really wants to get better."

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The insider added, "He still needs help walking. Lamar is not driving himself and instead has a driver. Whenever he leaves the house, he looks happy. He looks alert and often smiles. He is definitely looking more like the old Lamar."

The couple broke up back in 2013 but there divorce was never finalized because of an apparent backlog of paperwork in the Los Angeles court system. Keep up with Enstars for all the latest on the entire Kardashian family right here.

Tags: Lamar Odom Khloe Kardashian