I noticed that at a certain point with the first boss, if you beat it with Dareth, and have enough lust, you get an extension to the scene that you wouldn't ordinarily see otherwise. Does the second boss work the same?
No, for Dareth the 50 affection required make the threshold too hight, you have the full scene right from the start.
But for the "Lust" event, you have the same extension system
