Just so you know ...
I reloaded and down/help her again, even before i stolen the artefact.
This time i realized i dont even need to kill her, knock her into death saving throws was perfectly sufficient.
She left me ... permanently ... just as before.
And then, as i got into Goblin camp...
brand new outcome i have never seen before happened!
The Absolute completely overwhelmed my party ant they all ... passed out i gues? Not really sure, all narator said was that there is only darkness and silence. Then whole screen go dark.
Then i woke up in my camp.
Quick scene told me that now i possess Shadowheart artefact. O_o
And when i tryed to left it, or rest out ... i moved to cave camp for some reason ... it was impossible to get out in normal means, so i teleported to Blighted Village. And as i got to Goblin camp again, no cinematic happened, i run here as allways, just dont have "protected" buff from artefact, wich is still in my inventory.
Weird stuff huh?

But it certainly made me a little more hopefull that fylimar was right, and this was just incomplete ... ^_^