Oh, my. Were the calcium issues a problem with healing her motorcycle accident injuries?
The calcium taken from the bones makes it easier for them to fracture--but the high calcium in the blood make the fracture heal faster. It is an odd thing.
The accident made her weaker in general so the symptoms, including kidney stones, are now worse. Her kidneys cannot keep up with the calcium level now and there is more kidney damage from the calcium.
Check out this symptom cartoon: