The biological mother of Emperor Wen of the Han Dynasty was Bo Ji, who turned out to be the wife of Wei Bao, a general under Xiang Yu. After Wei Bao was defeated by Han Xin, Bo Ji was called into the Han Palace and became Liu Bang's concubine.
Bo Ji died of natural causes and died of old age. And he died two years after the death of his son Emperor Wen of Han.
I suggest you check out Bo Ji’s Baidu Encyclopedia