What's so wonderful?

I am unsure of how exactly I feel about Nora and Torvald in "A Doll House" by Henrik Ibsen . In this play Ibsen exploits the  true dynamic of a family. He uses the Helmers to show the audience how superficial and appearance based one family is, but how their "doll house" is slowly breaking down. Throughout the play I've noticed a few things for one thing the dollhouse itself. In a way the dollhouse reminds me of a glass house in that it is delicate and fragile. For the Helmers  the dollhouse is a game of pretend with Torvald being the owner and Nora as the doll. The pretend that what they have is real so others will think what they have is beautiful and be envious of their happiness. Torvald likes to show Nora off as his carefully made up doll, in which he controls and she will follow his lead. This idea of the dollhouse as the glasshouse is that the dollhouse must be kept beautiful, free of debt, and pure for that is what makes a perfect home, not loyalty, honesty, and love. But imagine a glasshouse; it's one of those things that if set up correctly it is beautiful to look at and looks as though it has been so carefully thought out that you don't want destroy it. But there's a problem with a glasshouse it's contents are completely visible to everyone, there are no secrets. Also as perfectly and carefully as it has been designed it takes one sharp enough thing from the outside to strike it at the right spot then the whole glasshouse comes down, and we know that broken glass is painful. So when this house breaks down everyone inside is affected. Let me take the whole glasshouse metaphor and apply that to dollhouse. Torvald prides himself that his home is debt-free, because he says that a beautiful home is not beautiful if it is not free. He has built thus house to be completely superficial to give the presence of something real. For those who look at the Helmer's home they see a very loving home, children, and two madly in love parents but it's all an act. Then there is Kristine and Krogstad, who can see the truth. They see the disconnect that lies inside the dollhouse, they see the lack of understanding between man and wife, but they are outsiders. They don't fit in with the dollhouse. The
letter  Krogstad leaves in the mailbox is the rock that hits the glasshouse. Once Torvald reads the note, and realizes how Nora has committed forgery everything has changed. And now the glasshouse is breaking affecting Torvald , Nora and the kids in the process. This is where the idea of the wonderful is supposed to kick in. The wonderful is the response Nora thought Torvald was going to have once he found out what she did. She thought he would take the blame for her actions and handle the situation and she,in turn, would not let him then she would've killed herself , but they would have developed a true family. But that's not what happens at all. Torvald realizes he will have succumb to Krogstads threat . Nora can't believe this and eventually leaves.