Talk:Duchess In Distress/@comment-174.226.4.124-20130811042827/@comment-85.157.76.57-20130811084210

Exactly when it says it does in the above text: after you accept Deny Salvation.

However, you must have done the Duchess's earlier quest before this, ie the one where the Duke is strangling her and you end up in the dungeon. If you didn't, then you can't get this one either. Also, Mirabelle is easy to miss so you might not just have spoken to her.