In act two, Nora was going to ask Dr. Rank to borrow money and pay off her debt to Krogstad. Also, in this act Dr. Rank profess his love for Nora. I think maybe if Dr. Rank was not so  ill, Nora would rather be with him than Torvald. What do you think? Later on, in the play Krogstad feels its finally time to tell Torvald, Nora's dirty secret. When Nora tells Krogstad she will come up with the money to keep him quiet he says "Even if you were to stand there with a mint of money in your hand, you wouldn't get your bond back from me" (Ibsen pg 198). This shows that Krogstad can be very heartless when it comes to business and how much of a hypocrite he may be.

  After Krogstad had threaten Nora, to tell her big secret he also says "now you've been warned, so don't do anything stupid. I shall expect to hear from Helmer as soon as he gets my letter" (Ibsen pg 200). Nora decides that she should commit suicide because she feels the letter would ruin their lovely happy home. Before the party, Nora tells Mrs. Linde everything about her deal with Krogstad and Mrs. Linde decides to help Nora because she knows that Krogstand would do anything for her. Nora was being capricious and has been trying to shall Torvald from going to letter box. "All right, there's nothing to be frightened of; we're not coming in" (Ibsen pg 202) I think Nora should not been suppressing her secret, sooner or later he may find out the truth...