Kaliyoonjal
Kaliyoonjal movie portrays a brother to a disturbed sister. The sister, played by Shalini, is mentally disturbed if any thing goes against her will. She is possessive of her brother and creates a havoc when she gets angry. Enter Shobhana who marries Mammootty and Dileep, who plays Shobhana's brother and marries Shalini, and problems start up in the family.
Starring Mammootty, Shobana, Dileep, Shalini, Oduvil Unnikrishnan, Jagathy Sreekumar, Praveena, Mala Aravindan, Karamana Janardanan Nair
Watch "Kaliyoonjal" on Amazon released in 1997. It's a drama movie, and has a rating of 6.2 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.