Do you tell them? I do sometimes.
For example I had to buy a new tile saw. It costs $650, but I told the wife it was around $300. Just to avoid any possible arguement because we're saving up for new furnature for the new house. I needed the saw for work though, and sometime she doesn't understand how much some of my tools actually cost.
So are you totally honest, or do you tell little white lies once in a while.