My wife found out about my money market account?

Ok, I can understand where your wife is coming from. After 25 years of marriage that is definitely shocker to come across. I'm sure she feels betrayed even if your discrete ways weren't meant to harm. She may have felt that you were having doubts about your marriage. I think you should appologize and come clean with anything else you may be keeping from her. The woman has stuck by you for 25 years she doesn't deserve you holding anything out on her!