I have to agree with Christina, there's no trust in the relationship and that's a sign of a troubled relationship. If I was in your husbands shoes I'd be doing the same thing just because I know you're snooping, just on principle alone. No one likes to be treated like a child or a cheating husband for no good reason. Put all the effort and time you're putting into pondering his motives and snooping on him into the relationship and maybe it might help the relationship a little.