Yeah,  sometimes guys tend to say "my wife" this or that way to much.  Almost as if to proclaim to the world their heterosexuality.
My best friend often does that.   I once stopped him and said:"why don't you just say Sarah?  I know her name!  I was at the Wedding remember?  Duh!"
He then, paused, then said, "sorry, just a habit I have from talking to coworkers."