This only works if you want to finish the game as Arwin's sex slave. I went down that road on my first playthrough, thinking I could always use blessed Water and Emerald Tea to fight the brainwashing, but it was too late. As mentioned earlier in the thread, if your "Maid Obedience" status exceeds a certain threshold, Aura betrays her party, John, Desmond, and his companions die, Charlotte and Paul, seeing they're going to die too, run away, but are later captured... And that's not all.
So, I don't see how it can be an advantage to end up a sex addict with a big empty skull, not even memories of her past, except to see those scenes of course. It's one of the ending, good or bad, your call, but it certainly shorten the whole plot