Well, by the way, yesWell, that would be one of the classic NTR endings. In fact, the fact that she returned to Kirito doesn't change anything. She knows, Kirito knows, and everyone knows that Asuna fucked in all the cracks with Inoda. And in such endings, an awkward conversation scene usually follows, where a woman and a man both realize that nothing will be the same as before. If Fujino makes such an ending, it will just be a classic ending. 10 NTR out of 10.
A serious conversation in the NTR game... To be honest, I haven't met him. But I haven't played them much yet. Usually in these games it's like this - I don't care if half the city and all my work fucked you! I love you so much! Yes, yes! And I love you!
And for some reason, this is considered a happy ending to the story...