Unnai Naan Santhithen
Unnai Naan Santhithen () is a 1984 Indian Tamil-language film written and directed by K. Rangaraj, and produced by Kovaithambi. The film stars Sivakumar, Sujatha, Suresh and Revathi. It was released on 23 October 1984 and became a success. The film was remade in Hindi as Sindoor (1987) and in Telugu as Sumangali (1989). Plot 
College student Indhumathi is the playful only child of Janaki. Indhu falls in love with fellow college student Murali. Murali's father, Sabapathy, and Janaki agree to their marriage but under the condition that both must graduate first. Indhu is worried about her Tamil exams as that's her weak subject. Sabapathy arranges for Indhu's professor, Raghuraman, to tutor her. Raghuraman is shocked to see that Janaki is Indhu's mother and even more shocked when Indu mentions her deceased father as Captain Jagdeesh. In the past, Janaki and Raghuraman were married. Janaki sang at stage shows with her friend Vijay and Raghuraman suspected the two of having an affair. Unable to stand her husband's suspicions, Janaki left him and found sanctuary with Captain Jagdeesh who was a widower with a young daughter, Indhu. When the captain died, Janaki raised Indhu and allowed her to believe that Janaki was her biological mother. In the years of separation with Janaki, Raghuraman has realised the error of his ways and is sympathetic to her current situation. He agrees to keep their marriage a secret and the two grow closer again. Murali sees the two in an intimate situation and informs Indhu of this. Janaki is now forced to deal with her daughter's displeasure and the fall out that her relationship with Raghuraman has on her relationship with Indhu. 