Imposters Meet Their Makers

A cute, fluffy Sterek fic.
Derek needs to check a building for the scent of the alpha pack. Unfortunately, the building has very tight security. A perfect opportunity comes for him in the form of Stiles' cousin (the real Miguel.)
However, Stiles can only bring his boyfriend/girlfriend. Will pretending to date Derek ruin their friendship?
You probably already know the answer. ;)