Anne is having a birthday party. She is blowing out the candles on her magnificent chocolate cake, surrounded by friends. Suddenly she wakes up and remembers she is in the annexe, and her 14th birthday will be a much more modest affair. Her family give her whatever they can, but the only present that really excites her is the bar of chocolate she is given.Anne is growing into a young woman and is amazed by the changes happening to her body and emotions. Her periods have started and she is becoming aware of her sexuality. She has even started to look differently at Peter, especially when he passes her on the stairs, wearing just a towel. Otto measures Anne and Margot against the wall and finds that Anne has grown three inches in the last year.The families are growing out of their clothes and don't have the money to replace them. In fact, the Van Daans have little money left and row furiously about whether they should sell Mrs Van Daan's fur coat. When Anne walks in on their argument, Mrs Van Daan turns on her and Anne goes up to the attic to sulk.When Peter comes up to the attic she tells him that she sees him differently now and apologises for having teased him in the past. She asks him if he finds Margot attractive and he says he's never noticed. She invites herself to accompany him down to the warehouse to collect the potatoes.