12 subtle signs that proof your spouse might be cheating

4. You found a credit card in your spouse’s name you didn’t know about

Most married couples have joint accounts or share information about family finances. There are budgets to consider and conversations about spending before a big purchase. “When you find a credit card, you’ve got a smoking gun,” Masini says. Unless this is a work credit card, which you’d probably know about, a secret credit card is pretty hard and fast evidence that your partner is cheating.”