Wiglaf has a mother! Who he speaks with! In media Hero's with happy families is surprisingly rare. Unless the Hero is adopted, but I'm going to be optimistic and hope Wiglaf isn't adopted and his parents are his parents. His mother planning on visiting to meet... wait, Wiglaf was flirting with Mordred when he slept on his shoulder! It has to be, otherwise why would Wiglaf's parents be coming to meet him?

I also have to sadly surrender the comments-only-cannon suggestion that Wiglaf was flirting with Driver. Unless he was flirting with Driver and kept her name out of the communication to reduce embarrassment. Particularly since he's sharing a room with the girl, and not the guy. Hmm... comments-only-cannon-interpretation that Wiglaf has been flirting with Driver can continue!