Although Frank is always cheating on her, Eva still cannot bring herself to leave him. But Frank objects both when Eva becomes pregnant as well as when she takes a lover of her own.
The story of a man who goes out looking for hamburgers, while he has a beautiful steak at home. Frank and Eva can't live together, but can't live without each other either. He has sex with every woman he can get, while Eva wants to start a family. She, on the other hand, seeks more stability and wants to start a family. Out of frustration about his behavior, she starts an affair with their mutual friend, but whether he can give her what she wants?
The suicide scene at the start is quite funny. You should watch this one with subtitles.
50:08 Eva seduces their mutual friend, but he rejects her, not because he doesn't want her. In fact, he loves her. But that's the problem, he knows that Eva will just come back to Frank after she's done with him, and that will hurt him.
1:07:47 Frank comes home to find Eva having sex with a guy (not their mutual friend).
More Info for Frank & Eva (1973)
Rarelust.com (with English subtitles)