I sympathise. My mum developed this habit some years ago when she was in hospital. It was caused by anxiety that she would have an accident. Fortunately she stopped when she returned home. It was very hard to distract her while the obsession was uppermost in her mind. It seemed to be the most important thing to her, more important than anything else. I suppose it was a way for her to feel in control of her body.
This may sound counterintuitive, but I would get Audrey to drink more water. Her bladder and ladybits may be irritated by strong urine, or a urine infection. More water dilutes the urine and washes away bacteria. If she is not on Warfarin, give her cranberry juice to drink, or add cranberries to food. They kill off bacteria in the bladder.
If she is wearing incontinence products all the time this creates an ideal environment for bacteria to multiply. Could she manage without them at home and wear cotton pants during the daytime?