Octavia Melody is the most difficult part of Symphony's day. Everypony hangs on her every word, worships the ground she walks on, and generally makes a big fuss over little things even when, in Symphony's expert opinion, she got that 3rd G flat wrong in the second movement.
Thankfully, Symphony has a sister; a very observant sister who's intent on coaxing Symphony's woes from her in the least embarrassing way possible.
No matter how embarrassing the least embarrassing way is.
A story designed, or at least intended, to cause warm feelings without the requirement to set fire to your house. You're welcome.
Many thanks to CyanAeolin for the cover art for the piece, have a gander at his deviantart page for both similar, and different, images.