Hmm, well this will be fun.
Ok, Westian is being so relentless Ameena can't ignore this one. Basically, what will happen is that as he is stating the story Ameena will get odd little flashes. At the end of his story it will all culminate in a really fast slide show - like sudden;y rememberign a dream all at once, that kinda corroberated what Westian is saying.
Of course, before Ameena would know what hit her - she might recall a battle, something do do with Aurek, and Falkor, and some person with her but not the rest - sudden;y she'd get the very emotional terror and see a flash of Lord Chaos.
I imagien this could knock her enough.
Anyway, for your will save. 25 (can you make that) buys you no ill effects, except Ameena suddenly has this crystal clear 'dream' that terrifies her in her head that Westian knew (placed there?), worse yet she will just have the impression and vague image of Chaos threateneing to shut her mind down.
Feel free to play as terrified or simply stunned, definitely confused. And will also have the scary image of that crack in the ceiling again. Wow, it's like I'm ripping off Steven Mophatt but I got there first :p
If you 'only' get 20, Ameena will take 2 non-lethal damage and be shocked.
If you get a 15-19, Ameena will take 4 non-lethal damage, and be very confused and worse for wear.
If you get 14 or less, Ameena takes 4 lethal damage and feels as if she has an intense migrane. Obviously, thinking too much about the dual timelines will keep it going, if she focuses on - I assume - just what she 'knows' of the first run, she'll be able to think again (still have the damage though)
So yeah.
Don't worry, you are getting off easy... nasty people poking murafu deserve to have their charatcers feel far worse!
