That Makes It All Right

 

Frédéric Auguste Dufaux, Le Bal Costumé

Hmm. This woman's clothes are skimpy, scant and scandalous. She's sipping champagne in front of a painting that belongs in a boudoir.  Looks pretty suspicious to me.

Oh. She's at a costume ball. Never mind.

I know nothing about this painting. I'm guessing from the hairstyles that it's from about 1900 and I'm guessing that it is more likely European than American.