I don't much enjoy the wreck and try not to dive it but I think itk is at about 60 or 70 feet, deepest. About 40-50 feet at shallower parts. It is NOT a difficult dive. Unless the diver was in major distress, best just to hang out at shallower level w/o penetration although hopefully that contingency would have been discussed with DM on the boat before dive began. You can follow bubbles of divers as they move through the wreck over the top of the wreck and meet them when they exit. Even if she stayed at the point where divers begin their entrance, the wreck is small and visibility is usually such that divers can see entering bubbles from the exit point. There's enough to see swimming around the outside of the wreck. Since the report is she didn't want to do second dive, I'm wondering if she felt ill/off and this wasn't a precursor to something else like heart attack, stroke etc.
The Sleeping Shark is a really nice, well-outfitted, well-maintained dive boat. I've been on it a couple of times as it's a "freelance" rented out shops who have an "overload" of divers. I know the DM they typically use and he is a good, careful DM.