I'd add another category: the category where the non-POV character has reason to think there isn't consent, but the reader knows there is. (Generally the non-POV character is dominant, but not always, or it doesn't even have to be a sort of sex where that matters.)
The simplest form of this is just lots of alcohol, and one person thinks they're taking advantage of the other's intoxication. But since the drunk character is the POV character, we really know that they're all for it, and would be sober, too.
I've seen authors manage to pull this off from both sides at once -- i.e. they *both* think they're taking advantage of their drunk friend (whom they've been secretly lusting after). And while I realize it's a silly storyline, it's also, honestly, a bulletproof story-kink of mine.
It doesn't have to be alcohol -- sex pollen, spells gone awry (hello, HP fandom), etc.
(here from metafandom)
The simplest form of this is just lots of alcohol, and one person thinks they're taking advantage of the other's intoxication. But since the drunk character is the POV character, we really know that they're all for it, and would be sober, too.
I've seen authors manage to pull this off from both sides at once -- i.e. they *both* think they're taking advantage of their drunk friend (whom they've been secretly lusting after). And while I realize it's a silly storyline, it's also, honestly, a bulletproof story-kink of mine.
It doesn't have to be alcohol -- sex pollen, spells gone awry (hello, HP fandom), etc.