Try to catch them in a lie. This can be hard to do if you have a bad memory for what they say they are doing all the time. Then how to catch a cheating husband? Keep a journal of what he’s supposedly doing. Be sure to include lots of details like date, time, places, people, and any excuses he might give. If someone is lying, then eventually they are likely to change their story, and your husband will try to make it seem like it’s your memory that’s the problem and not his infidelity. To give you peace of mind that you aren’t going crazy as well as to catch him in his lies, this journal will be very valuable.