And then I walk into their house and steal all their possessions. Fair warning: this is going to be a fairly petty rant. But ...

The “An Untimely End” quest concludes with a crucial encounter with Ygwulf, where you face a key decision: will you kill Ygwulf or spare him?

Yes, it is possible to save Fior mes Ivèrno from burning, although it will still be attacked if you take the steps to do so.