probably one of the reasons so many women DON'T report rape when it happens is because of this type of thing
yes, no means no, but when it comes to the legal system, the twisting, the spins.. the lawyers will do whatever it takes to get their client OFF the charges - if that means tearing down the reputation of the victim then so be it (this kind of thing is probably one of the reasons a lot of people dislike lawyers
)
Unfortunately we don't live in a black/white kind of world, so each individual case could have a different outcome - though I'd say that the defense lawyer would no doubt latch on to the adult/porn angle and play it for all its worth that doesn't mean the jury wouldn't see through it and realise that if a woman says no, she MEANS no, even if she's fucked 5000 men prior to that ONE.
We can at least HOPE that our fellow man/woman would do the right thing and judge each case based on evidence of the crime rather than reputation of the victim.