Board Thread:Skyrim/@comment-108.203.204.230-20150105221722/@comment-6881629-20151112212403

Destroy the Dark Brotherhood! can only be started when you first meet Astrid in the shack. The only thing you can do at that point is like you said just not do the quest, that might leave Solitude stuck in wedding mode though.

I've done Destroy the Dark Brotherhood! a few times now but just stormed the sanctuary normally.