Hindi sa iyo ang mundo, Baby Porcuna (1978)

Beth Bautista is Baby Porcuna, a burlesque dancer working for Dick Isreal, who is also her lover. She meets Joseph Sytangco, a struggling singer who wants to marry her. Seeing Dick in bed with a chorus girl, she weds Joseph but Dick intervenes. Anthony Alonzo is Boy Golden, an underworld kingpin in love with Josephine Garcia but he also beds Suzanna Gonzales. These lovers are all trapped in their dangerous ménage-a-trois, resulting in some deaths, assassinations and suicides.