Indru Nee Nalai Naan (1983)

Jaishankar marries Lakshmi who prefers his brother Sivakumar. Then Sivakumar marries Sulakshana and has a child. Suddenly Jaishankar dies and now Lakshmi feels differently about Sivakumar and they starts living together. When Sulakshana finds out she tries to kill Lakshmi. Sivakumar tries to stop it but Sivakumar goes to jail for the murder. Lakshmi comes to see Sivakumar in the Jail and he tells Lakshmi to get married but she says no and commits suicide in front of Sivakumar.