Is it? I just assumed it was always scripted to be the one when you fight the first mob right after the cutscene of Kirito fighting through the mine as Asuna and Inoda do stuff hidden (ends with pixel animation of Asuna giving Inoda a blowjob behind crates.)
That's where I first encountered it and because I saved just before the cutscene (before entering the door that triggers the cutscene), when I went back on the save to re-watch the blowjob scene it came up there again. So it felt scripted to me. Maybe the save state just also saved and locked in whatever random generation was meant to be next as the blowjob scene.