Throughout the affair with Leon, Marta experiences intense sexual awakening and fulfillment that she hasn't felt in a long time. She becomes consumed by her passionate encounters with Leon, which are in stark contrast to her lackluster relationship with Dario. As Marta's affair with Leon intensifies, she starts to question her feelings for Dario and the nature of her marriage.
Meanwhile, Dario begins to suspect that something is amiss with Marta and becomes increasingly suspicious of her behavior. He hires a private investigator to follow her and eventually discovers the affair. The revelation of Marta's infidelity rocks Dario to his core, leading him to confront Marta about her betrayal.
As the truth comes to light, Marta is faced with a decision between her illicit passion with Leon and the stability of her marriage with Dario. Will she choose to continue her forbidden affair, or will she reconcile with her husband and confront the underlying issues in their relationship? Monamour delves into themes of love, desire, and the complexities of human relationships, exploring the consequences of infidelity and the search for fulfillment in a mundane existence.