"Growing Pains" (джен)

Written for a prompt on the Thor Kinkmeme on LJ: "Odin, in this universe, has the foresight to realize that keeping Loki's origins from him could end up alienating his son. On his tenth birthday, he tells Loki of his Frost Giant heritage, and while it upsets the boy initially, because he is young, he is able to bounce back once reassured of his parents' general support. Still, Odin urges the young Loki to not tell Thor until he feels that his brother has truly matured to the point where it won't affect his overall view of Loki. Meanwhile, some odd years later, Loki is going through weird frost giant puberty and Thor is entirely convinced that his brother is ill or mental or some thing or other. Hi-jinx ensue."