I often see advice to the effect that each partner in a marriage should have an agreed upon discretionary budget, money that is yours to spend without discussion. The key is to have that agreement made before the spending happens. We haven't actually worked that out in 40+ years, but my DH has an much more expensive hobby (golf), and so I could probably get away with murdering the budget if I wanted to, but I'm pretty much a tightwad anyway. I don't know how to get out of the situation that you're in without coming clean. Possibly you could work it out from the question of why he thinks he should get to decide what you spend on your hobby. You would be in a position of strength in this as long as your spending isn't cutting into the budget for necessities - especially if he has something he spends money on that you don't have a say in - cigarettes perhaps? Fishing tackle? Whatever it is, there's probably something.