As I understand it, income is joint property in a marriage, so you are entitled to half of her income, whether it is wages or bonus. If she got new credit cards in her name, did she use your income to qualify for them? I can't speak for your wife, but I get credit cards all the time based on the family income and with a quick forged signature of my husband's name. And he has pointed out to me that if I am getting credit cards based on his income, then he wants to know what is going on with that card.
On the other hand, this might be a good time to go ahead and split the financial stuff and decide how much each of you should contribute to the household monthly. I think you should ask for transparency now, not after it becomes a problem.
