oof, wrong again soyboy, gold star for effort.
There aint a singular audience for AVN's, and even then, plenty of other AVN's have female characters, of all relationship status, that don't have any connection or romance to the character, to dumb it down, existence of a person doesn't automatically mean that they have to fall in love with the main character.
And Even going back to the original point, it cannot be NTR, unless there was a relationship in the first place, assuming there was one simply because they met is like saying hallmark christmas movies are actually family friendly cuck movies.
next time, try to find logic within your reasoning ;)