Patayin Mo Sa Sindak Si Barbara

Patayin Sa Sindak Si Barbara lit. Eng. Kill Barbara in Fright is a 1974 psychological horror film starring Susan Roces as the eponymous character.

Barbara Roces has always been overly indulgent of her little sister, Ruths every whim. Years later, Barbara meets and falls in love with Nick Rivero, who is smitten with her. But the spoiled Ruth Ortiz confesses to her older sister that she too is in love with Nick and threatens to kill herself if he does not marry her. So with a heavy heart, Barbara once again accommodates Ruths demands and convinces Nick to court her younger sister instead. In a twisted act of devotion, Nick reluctantly agrees to marry Ruth, to prove his love for Barbara. After the wedding, Barbara decides to start a new life abroad, to give Nick a chance to fall in love with Ruth and for Barbara to get over her feelings for him.Her past comes back to haunt her when Barbara receives news that her younger sister has killed herself and was witnessed by Ruths only daughter Karen Esguerra. Barbara immediately returns to the Philippines to mourn her sister and comfort her unstable niece. Upon Barbaras return, she learns the reason surrounding Ruths mysterious death. ........

Source: Wikipedia