In my Dark Urge playthrough, I am very confused about what happened to Isobel at the end of Act 2. The story does contain spoilers:

At the Last Light Inn, I tried to protect Isobel, but she got abducted despite my best efforts. I decided to roll with that, thinking that there would probably be a future opportunity to free her. That did not happen. When I started fighting the disciple of Myrkul, she was there suddenly, and she was hostile. We did not attack her, she was level 5 and didn't do much harm. When the giant skeleton was defeated, Isobel was suddenly dead, without any discernible cause. Dame Aylin fled the scene through the portal without a glance in the direction of Isobel's remains. That was strange by itself, but back in the camp my companions scolded me for having murdered Isobel. In a conversation with Minthara, my main character even admitted doing so. She said she was compelled to do so by her butler. But that never happened! She met the butler only once, it must have been in act 1 after the bard lady happened to be killed. I am sure Isobel, whom we had not met yet, was not mentioned.

Is this how it is supposed to go? Because I get the distinct feeling the story just derailed on me.