Lets take the suspicious cell phone behavior for example. Mary can get a hold of those numbers in her husbands cell phone or any numbers that she can get her hands on that seems suspicious and perform a reverse phone look-up and find out who the numbers belong to. So, Mary would know the full name and address of the person who is in contact with her husband along with other bits of details depending on which type of service she chooses to go with. She can use this information to help catch her husband in a lie and find out if he is cheating.

She can take those other signs and also use certain methods that can be done personally and easily to get the evidence to expose her cheating husband. There are plenty of methods that can be done according to which sign is displayed that can help you how to catch a cheater such as the reverse phone look-up.