The piece that Susan Wilson plays throughout the movie is the Brahms Intermezzo in B-flat minor, Opus 117#2. In the scene where she drowns out Mr. Glover's knocking, she switches to Chopin's "Heroic" Polonaise in A-flat major, Opus 53. Towards the end she plays Chopin's Etude in A-flat major, Opus 25#1.
