It doesn't matter that you've had sex with them before.
It doesn't matter that they came back to your place.
It doesn't matter that they agreed to something else.
It doesn't matter how they are dressed.
It doesn't matter that they previously agreed to that specific thing.
It doesn't matter that you are in the midst of something consensual and they changed their mind.
It doesn't matter that their "no" isn't forceful or violent or accompanied by them leaving.
Clear, enthusiastic, ongoing consent is both sexy and vital.
I fear that there will be some *dreadful* takes on consent (elsewhere) following Brand's conviction.
@neil "It doesn't matter that you are in the midst of something consensual and they changed their mind" does not, to me, read the way I think you meant it to.