My guy, that scene appears at least once every 5 pages in this thread, so I doubt that anyone does not know it at this point.
The only ones who do not know it are those who do not want to know anything about NTR and even for them it would not be a spoiler because it is part of the content that they will never consciously see.
I mean, the boy didn't see it, it's in the game, it can happen, it's a part that without being canon is the end, but it's not a spoiler because it was ever said? Strange way of thinking that one.
And for those who turn off the NTR, they don't want to know, so all the more reason to put it in spoiler, why generate a senseless war (again).
But well, I'm not going to debate any more about this. Have a nice day.