Elise confronts Lauren after discovering her with Nathan in the hospital, initially fearing an affair. Lauren explains that Nathan has a genetic heart rhythm disorder inherited from his father. He was diagnosed after collapsing at work and had secretly undergone testing and treatment without telling Elise.
Nathan admits he asked Lauren to be his emergency contact because she was both involved in his redevelopment project and worked as a cardiac genetic counselor. He feared Elise, a nurse, would become consumed with monitoring his condition rather than remaining his wife.
Elise is deeply hurt, not because Nathan was unfaithful, but because he made an important decision about their marriage without allowing her to support him. Nathan explains that knowing her medical knowledge made him afraid she would notice every symptom and live in constant fear.
Lauren reassures Elise that there was never a romantic relationship. She had simply helped Nathan navigate his diagnosis and treatment. Nathan had kept appointments and medical information secret because he planned to explain everything once he knew whether his condition could be controlled.
The doctor returns with Nathan’s latest results and confirms that his heart rhythm has stabilized, with no immediate evidence of a heart attack. He must remain hospitalized overnight for monitoring and further consultation with a cardiologist. Elise decides to stay beside him.
She tells Nathan that he made a terrible mistake by hiding his condition and that he cannot decide what she is capable of handling. Lauren jokingly returns the responsibility of caring for him to his wife before leaving the hospital.
Elise then asks Nathan to tell her everything about his condition, including his first symptoms, diagnosis, appointments, medications, and conversations. This time, he gives her the complete truth without omissions or secrets.
By midnight, Elise understands that Nathan had been frightened rather than unfaithful. She forgives him while making clear that secrecy was still harmful. She tells him they will change his emergency contact to her. For the first time, the mystery surrounding Lauren is gone, and Elise and Nathan face his uncertain future together.