A wife having affair with a trainer happened before and will happen again. It was her good intention to stay fit and healthy. You were thinking that she is doing it to make your relationship stronger. Maybe it was the first intention. However, in the gym there are instances that you get closer with your trainer. Of course, there are processes that need specific instruction from an expert. In the long run, that your wife is exposed to that environment, there are instances that she will commit a fault against you, and this could ruin your marriage. That is your responsibility to know what she is doing outside because what is at stake is not your relationship but also your name.
Remember that the gym is a public place and there are also people who know you. When she is fooling around, such betrayal will affect everything in your wife. Instead, you need to confront her with the issue. A wife having affair with a trainer in the gym is a reason enough that she could not be trusted. The decision lies in your hand if you will forgive her or not. You are a man and it is a different thing when she fools around. It is not so easy to be in a situation like this and there might be an instance that you get lost grip of yourself.
When you're having a hard time taking control of your emotion, you should seek help from a professional. If you browse through the internet, there are websites that offers their services to people who are in this kind of distress. They will give you specific advises that would fix your marriage or help you recover from this kind of adultery. Wife having affair with a trainer is an offensive move done by your partner, and you should evaluate the situation so you can come up with a decision.
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