This has been an entertaining topic to say the least. Its smart you didn't lie to your wife, but you do need to enjoy your life. Ask your wife why she feels this way? It has been stated guns hold their value, you have a hobby that can be turned into cash again if you need it. I can almost guarantee her hobbies or spending habbits can be made to look worse then guns.
My girlfriend and I split everything right down the middle. Mortgage, utilities, groceries, all of our fixed spending. We take care of our own vehicles, payments, repairs, insurance. We both put money into savings and RRSPs, whatever is left I can pend on whatever I want... Which is probably going to be black rifle project. We both make our equel payments of the living expenses and she never questions what I buy, and she rides horses, so chances are my hobby is cheaper anyway!