I hate to hear bad news like this. I hope the best for her family.
As divers, we can all learn from this. Here are two excerpts from the article:
"He looked back, and she was swimming off in the opposite direction"
AND
"Even her partner wasn’t sure what happened," he said. "I don’t know anybody ever will."
While the actual reason for her death may be unknown...it’s pretty clear what led her in that direction. She separated from her buddy and went off on her own...IN A CAVE.
As an instructor for many years, I can’t stress enough how important it is to stay with your buddy and to stick to your dive plan. I’ve seen way too many situations that have been avoided thanks to divers sticking together (ie: entanglement, low air, anxiety). Once you venture off on your own...YOU ARE ON YOUR OWN! You need your own backup air supply, you should be GREAT at buoyancy control, you need all the extra gear required for a solo dive and in this case, cave diving.
Be smart everybody. Plan your dive...stay close to your buddy (within one fin kick), watch your air supply, follow your dive plan and don’t do anything stupid.
That’s my two cents.