I'm looking for a Loki fic, set post-Avengers. Loki is taken back to Asgard and I believe the Avengers come along. Odin is a prat and decides to punish Loki for his actions on Midgard by taking away his magic and having Loki's mouth sewn shut again. Only, instead of Thor turning the needle on Loki, he starts to sew his own lips shut.
Additional things that I think I remember from the story but am not sure: Part of a series? Odin taking Loki's magic away is extremely painful for Loki? Frigga wants to protest but Odin basically keeps telling her to sit down and shut up? The Avengers being all like 'hell no, Odin, you are a terrible parent? Loki (obviously) being terrified about having his lips sewn shut again?
Hope some of this is ringing bells for people!