This is my "little sister" who I am an au-pair for.
We have many stylistic differences because she doesn't understand why I wear tattered tights or graphic t-shirts. But one look we can agree on is all black everythang.
A sweater dress is the perfect thing to have in your closet, especially a black one.
Hangover? Sweater dress.
Class? Sweater dress.
Bar during fall? Sweater dress + slightly opaque tights & Doc Martens.
[bonus points for hers having fancy buttons on the back]