It's not even that, though. That may be in question, but the question here is whether or not an unlawful deed towards a party ("revenge porn" is illegal) should invalidate other agreements made between the same two parties.

To put it another way, if I hire you to fix my plumbing, and then you steal my car on your way out the door, should I be on the hook to pay you for your plumbing services? The theft of my car is unquestionably a legal violation, and something I am not welcoming of, but what is being questioned is if that act is related to our plumbing agreement.

Earlier comments in this thread suggest that if I knew you were going to steal my car I would not have hired you to fix my plumbing, and therefore the plumbing agreement must also be null and void. But the courts aren't so sure – that there may be more nuance to that.