Marianne was discovered to be musical, she was invited to play. The instrument was unlocked, every body prepared to be charmed, and Marianne, who sang very well, at their request went through the chief of the songs which Lady Middleton had brought into the family on her marriage, and which perhaps had lain ever since in the same position on the pianoforte; for her ladyship had celebrated that event by giving up music
The comparison between Marianne showing her talents in music and displaying her abilities, and Lady Middleton, who used to play piano before marriage, depicts the importance of “female accomplishments” during this time. Women were to attain certain achievements (drawing, playing music, etc.) to appeal to their male suitors (Hughes, "Gender Roles in the 19th Century,"British Library).