underpinnings. I think she has just unfastened her bodice. Corset (no cover) tied at back. Petticoat (or drawers, i guess) must be held low in front by the corset hook. Chemise under the corset. Is this a strip-tease?
Weltseam corset tutorial This tutorial will walk you through the process of making a basic, boned Victorian underbust style corset from beginning to end. It is written with the novice corset maker in mind