The decision to divorce someone is a personal one, and it depends on many factors, including the specific circumstances and the laws in your jurisdiction.
In most places, divorce laws are based on "no-fault" or "fault" grounds. "No-fault" divorce means that you don't need to prove that your spouse did something wrong to get a divorce; you can simply state that the marriage is irretrievably broken. On the other hand, "fault" divorce means that you are seeking a divorce based on specific grounds, such as adultery, abuse, or abandonment.
If your wife's constant calls to a married man are causing serious issues in your marriage and you believe the situation cannot be resolved, you might consider seeking legal advice to understand the options available to you in your jurisdiction. Keep in mind that laws can vary significantly between countries and even states, so it's essential to consult with a family law attorney who is familiar with the laws in your area.
Additionally, before making any decisions about divorce, it might be beneficial to try marriage counseling or communication therapy as a way to address the issues in your marriage and see if there is a possibility of reconciliation.
Ultimately, the decision to divorce should be carefully considered, and it's important to think about the potential impact on all parties involved, including any children if you have them.