My Mom Is A Virgin (1991)

A rich old man pays a young lady, Duong Chan (means “moon” in Khmer language), for pretending to be his second wife, because his first wife has mental illness and she cannot take care of their small daughter. Dung Chan loves the little girl as her own child. A few years later, the old man’s son returns to Cambodia and he hates Dung Chan so much. Can hate turn into love?