S1·E42 Tauba Tauba (Part 1)

Which seemed like a picture perfect world of Vimla and Vijendra came to a halt when Vimla's younger sister, Roopa came to live with them. Apparently Roopa starts lusting for Vijendra, she tries everything to make him hers, without realising that this fatal attraction can destroy everything and creat a ruckus in the relationships.