For all Wes knew he was an orphan. Of course that was before Fox came and changed his life, starting his training as an assassin. He went from a whiny sit back and do nothing "I'm so sorry" desk jockey to a man with an agenda. They didn't account for him being so smart though and Wesley overturned the Fraternity's plans, helping them all to see the proverbial light.
Funny how they're all dead now.