Finding out if your spouse is cheating often takes paying attention to various details. Most everyone who cheats leaves behind some evidence no matter how careful they think they have been. You just need to know the right things to be looking for. Since you have likely been around your spouse for a great deal of time you know more about their habits and personality than they think.

For example if your spouse starts listening to different music than before, dressing differently, buying new clothes, trying a new hairstyle, leaves the house at strange times, or has a different attitude they may be cheating. Look for obvious signs that they are trying to hide something.

Does your spouse now use the computer only early in the morning or late at night when you are asleep? Are they deleting all the emails or using a new email address? Do they delete calls from the caller ID and go outside or to another room in the house to talk lately?

A woman may be cheating on her spouse if she is carrying around birth control pills or condoms when neither one are being used in the marriage. Women often buy new underwear and bras when they are having an affair. They also go out for hours at a time but then come home with nothing. How often do most women spend five hours at the mall and not buy anything?

A man may be cheating on his spouse if he starts carrying around condoms in his wallet when they aren't being used in the marriage. Hiding credit card bills and having less cash then usual can mean he is spending money on someone else. Pay attention to the smell of his clothing - does it smell like someone else's perfume?