When Asuna held Inoda's penis in the church, it wasn't invisible. Why should he be invisible if he is behind the curtain? Is the first blowjob an event with tents? It all looked strange there. Kirito pretended not to see Asuna's blue hair sticking out of the bushes. There are only a few scenes with Inoda's invisibility right in front of Kirito's eyes. It's the pool, the kitchen, the armpit when they were talking on a video call, and the scene in the church(pseudo threesome). It was as if we were told that Inoda made himself and his actions with Asuna invisible. From all this, it is only clear that Inoda's ability works at the behest of Fujino exactly as it should at the moment so that the idiot Kirito does not notice anything.
It's just my suggestion about glasses. I was just really surprised by those glasses on Asuna. To be honest, they look out of place. Well, that's just my aesthetic feeling. If they had any other meaning than being a decoration for Asuna's face, then I would understand it.