LFS: Stiles/Peter - Werewolves are Known
A friend has been trying to find this fic with no luck. It's short (maybe 5k). The Hale pack has an annual gathering to pick people to add to their pack. Peter overhears Stiles and his father talking about it, and he decides to add them both to the pack (the sheriff is injured or in poor health). Peter picks Stiles and then asks a boon from Talia to pick the sheriff as well.
If anyone recognizes this, that be awesome.