Answer and Explanation:
1. As a Puritan therapist my concepts are based on religion and Puritanism puts adukterio as a very serious sin, subject to public humiliation. In this case, my advice to him is to disclose the case of adultery to his wife, abandoning her and allowing her to live in shame and as a partner in society.
2. However, I would say that a better way to act would be to promote forgiveness, which is a commandment from God and to come to terms with his wife to reconstruct the marriage.