Fic for the Naughty and the Nice

So Happy to Serve for envinyatar15
Title: So Happy to Serve (2000 words)
Author: Who could it beeee now? *g*
Beta: Aunty Marion
Fandom/pairings mentioned: Harry Potter; James/Regulus, James/Sirius, James/Lily
Rating: NC17
For: envinyatar15
Warning: reference to past underaged sex (not on-screen) (characters 18 or older in fic); infidelity; sense of certain doom
Summary: First War era. Harry never knew he had an evil fairy godfather as well. . . .