I don't hide anything from my DH (except gifts, of course). If anything, he's an enabler, and
I usually have to remind
him that we have to stay within the budget.
I know someone that felt she had to hide EVERYTHING from her husband, especially financial matters. She'd lie, "lie by omission", hide the mail, get phone calls that she wouldn't answer (bill collectors), and so on. He was a very nice guy, and always treated her well, so I don't know why she felt she had to keep secrets from him. Bankruptcy followed ... then divorce. She re-married, and again, she hid everything from her new husband. Five or six years later ... divorce and bankruptcy. She's dating someone else now, and you can guess what she's doing ... AGAIN! This time she's actually having her mail routed to a different address so her boyfriend won't see it.
I couldn't live that way. I guess I just don't see how hiding things, especially IMPORTANT things, from one's spouse can be beneficial to the marriage.