When you're ready to convince your spouse to reveal they're cheating, ask casual, open-ended inquiries to bait them to tell you the truth. Be sympathetic and help your spouse feel comfortable confessing. Then take action by reporting them to the appropriate authority. Asking questions is a great way to find out if your spouse was involved in any incidents of infidelity. If they deny it, then follow up with more questions to see if they change their story. If they still deny it, then they probably were! You should never have to go through something like this, but if you do then try not to think about it too much. Focus on being together and working on your relationship so that one day you won't need to ask these questions.