Financial infidelity is bad, but it's even worse when it is used to engage in an extramarital affair.
Ruth Houston, the author of "Is He Cheating On You? 829 Telltale Signs," says the following nine behaviors may be indicators of a spouse's infidelity:
* Credit card statements that reflect charges for flowers, jewelry or other gift items that the spouse did not receive.
* Unauthorized or surprise withdrawals from joint bank accounts.
* Deposit slips or bank statements that indicate the existence of a previously unknown checking or savings account in the wife's/husband's name only.