Aakhir Kyon (1985)
(Released: Aug 30, 1985)
Kabir Suri (Rakesh Roshan) is an established businessman. He is married to Nisha (Smita Patil), and they live in harmony. Then Nisha gives birth to a baby-girl, and during her pregnancy, when she is hospitalized, Kabir has an affair with another woman. When Nisha returns home, she is shocked to find another woman has been sleeping with her husband, as well as using her clothes. To her shock, she finds out that the other woman is none other than Indu Sharma (Tina Munim), her younger step-sister, who has no intention of leaving Kabir for any reason whatsoever.