What Credit Card Bill?
Relationships brings in love and happiness, but they also carry some baggage like health problems, scars of past relations, childhood traumas etc. what is a very common burden noticed is debt burden. You don't feel very comfortable sharing this burden because you have that fear that your spouse will deny to share your financial problems.
Well getting rid of a debt is not as easy as it looks. It is very much predictable that you'll be caught after certain point of lying. So it is up to you, to want your spouse to get hold of your credit card bills and get upset or you should better disclose the issue and make things much comfortable.