Lamar Odom's wife says the former NBA star is unaware of the events that led to him suffer a stroke and that he has trouble speaking.
Odom was hospitalised after he was found in a critical condition after a weekend at the Love Ranch brothel in Crystal, Nevada. At the time, he was unconscious and bleeding from the nose.
He is reported to have overdosed on cocaine, but a cocktail of other drugs were found in his system.
In the weeks that followed, he reportedly suffered kidney damage and a series of strokes, in addition to needing an undisclosed emergency surgical procedure.
"We tell him he had a brain injury," his wife Khloe Kardashian said in an interview on the daytime talk show Ellen, which was broadcast on Monday.
"I can't tell him how that brain injury was caused because it will set him back. He's really confused a lot, so we have to remind him. Every day is different.
"He is off of all machines that help his organs, but still he has such a long way to go.
"[He is] learning how to walk again and feed himself again, put sentences together."
Although Kardashian remains married to Odom, she has been dating Houston Rockets guard James Harden, but refused to divulge any specifics about her future romantic plans.
"I'm just gonna say I'm, like, part of polygamy now," she continued.
"I have a husband. I have a boyfriend. That's a way easier thing to say."