solo piano music played by Aunt Birdie

Does anyone know what the piece played solo by Aunt Birdie is? It's at around the 1 hour 9 minutes mark into the film. It's in A flat major, in 3/4 time and stylistically so close to Chopin that I'd be surprised if it weren't Chopin. However, I can't seem to find it anywhere. Thanks to anyone who can answer this question.