Very true. I'll admit that I have split feelings about it. On one hand, someone's perceived privacy would be violated, which could result in criminal charge. On the other hand, the fetishist in me wants so bad to at least hear this woman in action. Difficult to reconcile such opposing interests.
If he does get a recording, I will certainly enjoy it. If he decides not to for fear of ramification, I have zero complaints, given the risk.