She was an angel (1947)

A dancer takes care of her sister and brother, while distancing herself from their lives so that her profession does not become a source of their misery. The brother graduates from medical school, and the dancer becomes involved with a handsome young engineer in whom she sees salvation from her profession and tries to tell him about She loves him, but she hasn't found the opportunity yet. However, she is surprised when the young engineer proposes to her younger sister.