There is unfortunately only one solution to how to catch someone cheating, and that is by careful monitoring and surveillance. GPS tracking, laptop and/or computer surveillance, and cell phone surveillance, including monitoring cheating spouse text messages are the best place to start. Technology has created tools for catching cheaters far more advanced and more cost-effective than ever before. If you have your suspicions, validate them because you undoubtedly have a right to know. Prior to using any products, make sure you know and abide by all laws that govern your location.