You and I My Love(1979)

Wamena is a businessman and widower who has a daughter, Narita. His secretary, Yuni, tries to marry Wamena and also tries to match Narita to Toni, who is actually Yuni’s boyfriend. Together, they plan to seize Wamena’s wealth. Alas, Narita already has a boyfriend, Arman, a poor young man. Yuni tries to manipulate the relationship by sending a fake wedding invitation. This causes Wamena a heart attack, which kills him. Narita is also against her father’s relationship with Yuni, so she storms out and leaves. Then Arman marries Narita and becomes the director of the company. Yuni and Toni resign from the company. Then Yuni tries to trick Arman by sending a pretty woman to seduce him and then takes a photo of them together. With this photo, she manages to trap Arman.