It depends on where you are. Are you in Chapter 6 or in Chapter 5? If you're in Chapter 5, Underdark, and the encounter in the Lust Chambers doesn't work for some reason, you can just skip it and go to Chapter 6. It shouldn't involve the quest in Chapter 6.
Hunrae's dialogue should work - but if you have a mod which screws Underdark and sets the Chapter variable wrongly, it may disable Hunrae's dialogue during the Underdark.
Another solution would be setting the chapter variable manually - but I don't recommend that. Spawning a new Hunrae is definitely a bad idea, too. Restoring a new install
http://forums.pocketplane.net/index.php?topic=1755 seems too drastic. So, just skip the encounter for now.
And please, post your Weidu.log - just in case. I'd like to know what influences this, at least.