Think about it like this, in English the words "erotic" and "porn" are related but not the same thing. All porn is erotic, but not all things erotic are porn. Porn is very much focused on sex, it focuses on fucking and its visual components. When you watch a porn movie, you see the girl screaming, eyes rolling around, and the huge climax as the guy blows his load all over her face. The story about why they're fucking doesn't matter, all that matters is that their fucking was hot.
But when someone is more focused on erotic, they focus more on the small things and less on the sex. THERE WILL BE SEX, but the bigger focus is on arousal, stimulation, and foreplay. The erotic nature of AWAM comes from these small scenes of Sophia slowly becoming more corrupted, showing her boobs to a prisoner, daydreaming about the neighbor boy, giving her daughter a kiss. It's erotic because it's arousing and stimulating, but it isn't exactly porn.
That's why we try to say that AWAM is an erotic game, not a porn game. To a non-native English speaker maybe it's confusing, but there is a difference.