My kids already know I'm a slob, so why would I tidy up on their account?

The Farm Manager and I have found ourselves on opposite sides of the question; do you tidy the house when the kids are coming over? To me, the answer is clear and clear-cut. My kids know I'm a guy who has a jar of pickles and three bottles of beer in the fridge and nothing else. They know Dad's vacuum cleaner stalled out before they were born. They know Dad's place and they know Dad never puts on a show. What you see, three bottles of beer and a jar of pickles, is what you get. On top of a generous diet of KFC and Mickey D of course. On the other side, the FM will spend days tidying up the joint if kids are dropping in. Who does she think she's fooling?