The area I circled in red makes me believe she's in shed:
I have noticed that when snakes are in the early stages of their shed cycle their skin picks up flash in a way that makes it look like their old skin is a sort of dry layer on top of the new skin. Not sure if you can really see what I'm talking about, but it's something I've seen in all my pictures of snakes in shed when I've used flash, which hasn't been there on snakes that are freshly shed. Often I can see this effect just looking at them under fluorescent lighting, but in photos it really only shows up when you use flash. I would expect this to be visible on the other areas where the snake is curved, too, but those other curves are out of focus.
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