I don't know where she got it from. It certainly looks top quality, not something you would get in Anne Summers or Primark (other cheap stores are available - where you would also not get such good quality lingerie).
I think that under corset are very sexy apparel, they accentuate the hour glass figure of the female body, i really like the mood in this picture, it brings me back to the prohibition period of Al capone. Great era.
I think her nose is a bit shiny and over-lit and the rest of her face a bit dark. I would try changing the levels - if it doesn't work out I'll leave it as it is. I always panic about noses - they tend to catch the light or cause unwanted shadows.
I'm glad to be back shooting models again - I've just had too many other things on my plate recently. Some of them being things that eat into my shooting budget as well as shooting time. Anyway, I hope to upload a few more from this shoot soon.