<human>: Can you succinctly summarize the text in 1-3 sentences?

My wife and I have been married for 3 years. I had an affair and my wife discovered it a few months back. We are now in therapy and working on things. Whilst she found out about this one, there is one that i had an ended in the past that she doesn't know about. I have basically resolved to take this one with me to the grave. I do not see any benefit for anyone involved if i told her about this. In fact, what i told her about this girl from the unknown affair was that she was an ex and did not do anything after we got married. After i told her that, she said she wished i had not told her at all and that i should have kept it to myself. I am basically determined to become the best husband i can be to my wife. I will not cheat again and i will guard against affairs in my marriage. What benefit will telling her about the old affair bring, especially after in a similar incident she basically said i should not have told her.
<bot>: Whats the benefit of telling my wife of an affair she will not find out? Shouldnt i just take it to the grave?