It took me all the way down to the part about the fiery brother before I realise it was Sue and Reed...as I've always thought of Reed with very brown hair while Tony has inky dark strands.

Well, yeah. *is guilty of screwing with canon* I had to alter Reed's hair color a little so that he and Tony could be identical from behind (Dr. Strange would probably have been a better body-double for Tony, but that would mean making Wong the princess, and if anyone's a princess in that relationship, it's not Wong).