The painting almost ruined him, and did ruin her.
In la Belle Epoque Paris people lined up for art exhibitions the way we do today for blockbuster movies. In this case John Singer Sergeant caused a scandal by painting something that was much more than just a portrait of a beautiful woman, and Paris didn’t like it. It almost ruined him, it did ruin his model, and I still want to ask him why he put the strap back up. Go here to see the portrait and then go read the book.
I don’t think she looks sultry, I think she looks disinterested. The dress and headpiece are gorgeous but I don’t think painting her head in profile does much for the painting.