Financial Issues
Odd expenses and money issues begin to appear. Cheating may by some means bring issues to the finances. Credit card charges to restaurants, gift items or suspicious expenses, increased phone bills; lesser savings… the credit card statement may provide a black and white clue about the infidelity.
The cheating spouse may get away with it at first but not at all times. Other likely signs that your spouse is cheating are of course, lipstick marks, change in his perfume or he is giving too much attention to his looks and his body which he never does before. He may also spend some time trying hard to look nicer than usual.