Relationships and arguments...question?

I work a stressful job (police ofc) 40-45hrs a weeks, four ten hour days....my wife is a gate agent at an airliner and works 20hrs a week, four five hour days......we have a toddler together as well......the argument is this.......I say to her that I make most of the money, I pay basically all of our bills and make 80% of our income and that I believe its fair if she keeps the house clean because she only works part time (she is very lazy about cleaining up, and the place is kept a mess most of the time)....she states that i don't do anything around the house and she also watches our son (I watch him too, and you can still get things done with a toddler) every time we argue I bring this up and she just repeats well what do you do besides work (which I think you can't just exclude that)......please tell me if you agree or disagree that I am being fair about working a stressful 40-45 hrs a week, and she works 20-22 hrs a week and keeps the place clean.....it only takes an 1 or 2 a day to keep the place clean.....am I being fair.....Thanks for your comments