Andrwho

On yet another one of the Winchester boys hunts they meet the son an old (dead) friend of Castiels. Andrew claims to be looking for his sister who was taken by demons over a year ago. Andrew also claims that his mother knew the Winchesters and told him stories about them and Cas. But during the time they spend with Andrew, Sam becomes suspicious about Andrews end game. Does he really have something to hide or is Sam just being paranoid?