In the scene where Kirito's dick gets bigger, Asuna says "His dick is so big, it hurts" and in every sexual interaction with Inoda, she is ecstatic because of Inoda's big dick. If he really wanted to handle this NTR this way, the developer had to go a different way. For example, it could have shown Kirito as an asshole chasing other girls.
This situation could have created a logical basis for Asuna to keep her distance from Kirito and get closer to Inoda. But no. While there is the main character who is handsome, strong, ambitious and does everything for his beloved, his lover keeps a meaningless distance from him. And both sides act as if there is nothing. This makes the game one of the cliché NTR games, as I said at the beginning.