I found out about my spouse's hidden loan debt

Girls, I'm in shock! Today, while rummaging through my husband's drawer, I found an envelope with a statement from a bank. It turns out he has a credit card debt of thirty thousand lira that I had no idea about. I thought we shared everything, but he never let on, maybe because of his busyness. If I ask him about it, a fight will break out; if I don't, it's eating me up inside. Honestly, I have no clue where this money went.