@ mattbfg
Thanks for the honest answer. I really don't see a problem with it then. Like you said if it was one of your mates that would be different... but your sitting there with you son even helping him out on co-op sections. As a kid I would have been thrilled to help my dad out with games and collecting trophies.
So yeah when you put it that way and your spending high quality time with your son gaming I can't possibly hold it against you.