We all understand that romantic infidelity can quickly lead to divorce, but can financial infidelity end a marriage? According to a new study conducted by the National Endowment for Financial Education, lying to your spouse about spending habits, credit card bills, or recent purchases can ruin a relationship.

Researchers found that a staggering 58 percent of husbands and wives hide cash from their spouses, while 54 hid major purchases. Thirty percent hide bills, while fifteen percent hide major purchases and even entire bank accounts.

Altogether, the study found that financial infidelity is the reason that 16 percent of marriages end in divorce, and that 68 percent of marriages are affected by financial infidelity in some way. Why? Just like all other forms of infidelity, financial infidelity can lead to problems with trust, deception, and openness.