Some women have trouble achieving orgasm, for others, the mere feel of a man's strong hand between her legs is enough to leave her quivering in ecstasy. Even through clothes.
Your wife is one of these women. No wonder she loves her new job.
The uniform-pantyhose, tight shorts, and a tight top-are enough that her customers can't actually fuck her. But the nylon layers between her pussy and the hands of her customers do nothing to inhibit her sexual pleasure. If anything, they enhance it.
You know this, you know that every night she goes to work she'll be fondled and groped, just a bit, just enough to make her wet, just enough to make her legs shake, just enough to bring her to orgasm after orgasm, night after night.