I know what you're saying in regards to her appearance and would think the same thing if I hadn't raised her myself & know exactly what has gone into her. To put it bluntly she's a beast, a freakish beast haha..
You can only see the skin between the scales in the one pic because I purposely had her stretched around my hand to see the scale rot better. She is thick and quite large overall at approx 42" and weighed in at 510g yet has only been fed roughly equal parts worms & fish for her whole life only twice a week (sometimes only once). Up until a couple of weeks ago she had maybe 4 or 5 pinkies total in approx a 3 year timeframe and gets barely more food per feeding than this male:



She's also quite active too. Her girth is mind boggling to me, and she's also had 3 litters of babies, which should be depleting her. One point though is that she has never been brumated which could very well be more of a factor than I might think, and the plan is for her to brumate this winter.