All the Right Noises (1970)

A family man with two young kids finds himself captivated by a stunning actress, leading to a passionate affair that spirals into a deep romance. Their connection intensifies, filled with excitement and secrecy. However, the relationship takes a shocking turn when she reveals her true age, disclosing that she is just 15 years old. This revelation forces him to confront the moral complexities of their relationship and the consequences of his choices, challenging his values and the stability of his family life.