That is awesome. I would definately take it as a sign of psychological healing, at the least. Oh, and you must be misting her well.
I used to have a pet sitter that Bud didn't like, and sometimes I would go away just as he was starting to shed. (Paws turning that milky shade, tail ringed with darker strips.) When I would come back two or three days later, he seemed to have sucked it back on, somehow, into a uniform shade of unhappy brown. There weren't even any skin pieces on my wall-to-wall carpet. I don't know how, but the shed would halt when he was unhappy. This happened two or three times. Here's what the Kaplan website has to say about it:
"If your iguana is not shedding, and it is not the winter slow-growth period, then there is a problem. It may be that the environment is wrong, the diet is not nutritious enough to promote growth or normal skin renewal processes, or your iguana is sick. The iguana may also be psychologically stressed. A review of the environment and diet is necessary, as is a review of any other factors that may affect how the iguana responds psychologically/socially to his environment. "