Serious shed problem

Hi guys, I'm encountering a serious shed problem on my cornsnake, one of my female cornsnake did not shed her skin for several times, after giving me a clutch on May, this cornsnake did not took off her skins until now! she is doing great on eating for several months, but now she has been off feed for almost 2 months, she had that opaque and dull color like she want to shed, but after that nothing happen, I witness 5 shedding behavior like that but no shed skin until I found out that her skin began to change, many black blotches and dry skin at her belly (picture below), I am sure that humidity is not the problem, I have owned her for 1,5 years and she always at her box like usual, she is doing normally before she lay her clutch.

Any body have some experience like this and can help me?

http://i209.photobucket.com/albums/b...0905-01692.jpg

http://i209.photobucket.com/albums/b...0905-01694.jpg

http://i209.photobucket.com/albums/b...0905-01695.jpg

How long exactly has it been since she shed and how much time is she spending in the humid hide? The only time my corns have ever had problems were when they spent too much time in a humid hide (namely my girl using her lay box too much). They are not tropical snakes and a little bit of humidity isn't bad but too much can cause issues. The dark patches almost look like scale rot beginning which would also be from her being in too much moisture. I'd need to see closer pictures to tell for sure though. Do the scales look like they are 'imperfect' or warping?