Ikaw Lang 1993 one on netflix

A librarian’s husband and mother-in-law turn out to be psychotically abusive. When the husband mistakenly thinks he has killed her, he dumps her in a river, where she is saved by a fisherman. Desperate for money and in need of help to take revenge on her husband, she hooks up with a bank robber whom she falls in love with. Together, they return to her husband’s home and kill him.