Say Hello to Yesterday (1971)

Struggling with the monotony of her suburban life and a stagnant marriage, a British housewife on the brink of middle age finds herself drawn to a charismatic young man during her daily train commute. Seeking a spark of excitement, she embarks on a passionate affair that challenges her mundane existence. This brief encounter forces her to confront her desires and the choices that have shaped her life, ultimately leading to a profound self-discovery amid the complexities of love and fidelity.