Sadhna (1958)

Mohan is a college professor whose mother wants him to get married to a good woman before she passes away, but Mohan requests her to be patient as he wishes to complete his probation period at the college he works at. Mohan despises prostitutes and courtesans and swears off them. Mohan's mother falls ill with a sudden collapse and is not expected to live longer. Mohan requests his neighbor to find a woman who could pose as his wife. The neighbor recruits a woman by the name Rajni and due to Rajni's frequent visits and care, Mohan's mother feels better and her health improves so much that she decides to give her family jewels to Rajni. Disaster strikes when they learn about Rajni's true identity that she is a prostitute of the name Champabai and this creates a major impact on Mohan, his mother's health and their reputation in the society.