Slave Mother (2003)

Aixiu marries a farmer, Aixiang, and gives birth to a son. In a desperate situation, Aixiang "pawns" his wife, Aixiu, to the Li family for three years, whose wife is unable to have children, and Aixiu's task is to carry on the family's legacy for her. In the midst of humiliation and pain, Aixiu becomes pregnant with the offspring of the Li family, but after she gives birth to the child, her situation in the Li family is in a state of decline, not only is she treated with disdain day in and day out, but she is also asked to do all kinds of menial and heavy work.

Unfortunately the movie Slave Mother is not yet available on HBO Max.