Apradhi Kaun? (1982)

This is a suspense movie. The character played by Arpana Choudhary is a poor girl who gets run over by an old rich widower played by Madan Puri. feeling sympathy and then love for the poor girl, he then marries her. However she does not enjoy her marriage and flirts with others. When her husband eventually finds out about her betrayal he does not leave any of his property for his wife. When she finds this out she hatches a plan to kill her husband and pass the blame of the murder on someone else.