When you catch a cheater, there three courses of action available. You can try to work through the problem to repair the relationship, you can end the relationship or you can daydream (and daydream only) about what it would be like if you ran over them with your car.
If you do happen to catch a cheater, it's natural to feel shock, anger and despair. There's nothing wrong with being upset; in fact, feeling happy about the situation would definitely be an odd response. The most important thing to avoid is going into denial about the problem. Don't lie to yourself or let others lie to you, because the problem will just fester and grow.
When you catch a cheating spouse or significant other, there are a few hard facts you're going to need to face.
Once you've caught a cheating spouse or significant other, you have some decisions to make. Those little decisions will help lead you to the ultimate decision, whether you should stay in the relationship or end it.
Why do men lie about cheating, especially once they are either deep into the cheating or have been caught? If you take a step back, you can learn to at least understand why they lie when they do.