so I cant avoid it otherwise, except if I meet the requierments? and not just I could do it later.Either buy the potions from the desire shop that reduce lust and increase sanity, the expensive way in other words, or get I think it requires 8 or 9 levels in succubus and one of the skills you can buy can change lust into sanity, and it does not care if sanity is maxed you can still keep casting it, though it has been a long time since I got that far in the game so I may have misremembered the skills you can get.
Edit I think some body else in an earlier post stated that it requires 0 lust and max sanity otherwise you get the bad end for that quest line, when you do the final stage of it.
Edit: I did what you said but it did not work
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