After I kill grelod the kind in riften and I start the dark brotherhood quest line, and when Astrid takes me to the abandoned shack, I always am the good guy and kill Astrid and start the destroy the dark brotherhood quest. I have some suggestions for scripted catchphrases the character can say to Astrid that the animators could have put in the game. I. E. After Astrid says "make your choice, make your kill, I wish to watch, and enjoy." Your character could say, "well, I'll give you something to watch and enjoy! A first hand view of sovngarde, to be precise!" Or, after she says, "you are not leaving this shack until someone dies" your character could say, "sounds good to me! Remember to say hello to grelod the kind for me!" I mean, they could have spiced it up a little more than writing "I'll have no part in this insanity" in the scripting. Or, after speaking to commander maro and then entering the dark brotherhood sanctuary, one of the assassins could say something like, "you are not supposed to be here" and your character could say "the penitus oculatus says hello" and attacks them. Again, i usually I try to be the good guy and keep my lifetime bounty to a bare minimum. The character I have now has a lifetime bounty of only 1000 and it came from the false imprisonment on the forsworn conspiracy quest. I do commit crimes while doing the thieves guild quests, but I raise all my thieving skills to where I can do it without getting caught.