Kim Richards' ex-husband, Monty Brinson, isn't doing well weeks after being hospitalized.

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Following a years-long battle with cancer, a source claims the journey of the father of Richards' daughter Brooke Brinson is about "to come to an end."

A source close to Monty told Entertainment Tonight on Tuesday that his family, including the Real Housewives of Beverly Hills star, was gathered around him at an assisted living facility, and "nobody knows at this point how much longer he’ll last."

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"He seems to mentally be good most of the time, he is just on a lot of medication," the source shared.

Richards has been "by his side quite often," the source said, noting that despite the dire circumstances, Richards has "been holding up well" and seems to be "at peace with Monty's diagnosis."

"I'm surrounded by love," Monty wrote in an Instagram post on Monday. "I got plenty of love in my heart. I'm here for everybody. This might be my final resting place but I'm content."

"Everyone has had a lot of time to be with Monty during all of this and had their time to process his illness," the source added. "Everyone is visiting Monty all the time, his family is always gathering around him."

For more of Kim Richards and her family, tune into The Real Housewives of Beverly Hills season six, airing tonight and every Tuesday night at 9 p.m. on Bravo.

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