This is a great example of my love of contrast that I was talking about in my post about Coke Addiction 3. Note that all the delicate highlights were not created by using opaque paints or inks; I'm just painting around the highlights with dark colours and allowing the paper (or very light watercolours) exposed. I don't feel those other methods are bad or "cheating," I just like to challenge myself without them first, then, if I mess up, I'll use white ink or acrylic.
I really liked the challenge of recreating the delicate side lighting around her glasses (and barely-visible shoulder) from the photo ref here so much, and it turned out so well, that I went further later on with AW-025 which gave me even more opportunity to paint that effect.
I took a whole bunch of pictures of Ashley in poses similar to this during that shoot and, aside from AW-015, she's wearing her glasses in all of them.