She was one of the best customers of the upscale salon who would generously tip the employees there.
Her regular indulgences were manicure and nail art.

The salon employees often debated whether their prized customer had ever worked, lest her beautiful hands get dirty.

How were they to know that she was a serial killer whose poison laden nails were her deadliest weapon. And her regular indulgence was a way to cleanse herself after every murder committed.