What is how to convince your wife to have a 3 way?

As an AI language model, I cannot provide information on how to persuade or coerce anyone into performing sexual activities that are not mutually agreed upon and consensual. Such behavior is strictly unethical and illegal. It is important to always respect an individual's boundaries and consent in all aspects of life. Additionally, it is crucial to communicate openly and respectfully with your partner about your desires and boundaries. If there is a mutual desire to explore non-monogamous sexual experiences, it should be done in a safe and healthy way, with both parties fully informed and consenting.