The Family Business (Teen Wolf and Supernatural Crossover)

Meet Stiles, a selectively mute 17-year-old boy from Beacon Hills, California. He isn't just any high schooler though. He's a werefox dealing with the guilt following a traumatizing possession. His first full moon, he shifts, running out of town and going missing for months.
Enter the Winchesters.
The best hunters in the business. Never miss a shot and always finish a case while saving more people than any other hunter. Got allies everywhere, from Heaven to Hell, and every hunter in America knows the Winchester motto, "Saving people, hunting things. The family business." To the community, they're always on top of things in the supernatural world, always on any case that's not already been taken by someone else.
To Sam and Dean, they are two lost sons who have somewhat of a clue what they're doing. Most of their hunting is on the fly and spontaneous. They've saved the world once or twice (or about 4 times, give or take), and they're tired. They've been through demons, witches, the Gates of Hell, angels, the Apocalypse. The boys just want to rest. When residents of Applewood, Missouri start turning up dead, Sam and Dean take on the case, hoping to get their minds off of everything that they've been through. When they figure out the killings weren't done by a werewolf but rather a werefox, they hunt the first they find. When the fox shifts to reveal a panicked teenager, the two stop in their tracks, not wanting his blood on their hands. Once they manage to calm him down, their work is unraveled as Castiel teleports to them to reveal some startling information.
Stiles is a Winchester.
Sam's son to be exact.
- Set middle of Supernatural Season 9, beginning of Teen Wolf Season 5
- Some information changed for the plot(Ex. Angels can fly still, Sam can still see Lucifer, etc.)
- Unfortunately, I am not Eric Kripke or Jeff Davis and do not own Supernatural or Teen Wolf