One way Anne matured with her relationship with her mom is because she felt so bad and guilty that she said all that stuff. In the diary it states,” Oh! Anne how could you”( talking to herself) which means she was feeling bad that she said all those hateful words about mummy that she said. After she read this stuff in her journal she realizes how hard she was in her mummy. That is one way that she is maturing in her relationship with her mummy.
In addition, another