Who does nora reveal her secret to?

Nora reveals her secret to Dr. Rank in Henrik Ibsen's play "A Doll's House." She confides in him about her forgery of her father's signature to secure a loan for her husband's medical treatment. This moment marks a significant turning point in the play, as it highlights her desperation and the strain of keeping such a secret. Dr. Rank's reaction also underscores the themes of trust and deception that permeate the narrative.