You have to talk with her and come to a new understanding about your marriage. If you feel that you can live with an "open" marriage (a marriage in which both partners have permission to have romantic relations, including sex, with other people) and you believe that this will not affect your family life, this choice belongs to you.
But, be clear. This is a dangerous way to live. Most open marriages end before long. It is very hard to sustain a normal family life with the spouses seeing other people. People fall in love, or think so for a while. They get comfort from others and want more. They make mistakes and everybody finds out. They leave to be with their lover. It can be very unstable.
Some cultures permit open marriages, and they are not a problem. Some people, like you seem to be, are not threatened by their spouse having a special friend. (It seems that you are more concerned about your parents finding out, and about sustaining your family's way of life.) If you are comfortable with her having sex with this man while you are away and want to give her this "gift," and if you believe she will contain her experience and keep it private, again, this choice belongs to you and to you alone. But you should think through what will happen if she is found out.
Some questions come to mind:
- Where do you live? From your earlier posts, I understand that an open marriage arrangement is not permitted in your culture. Same for divorce: not permitted. Correct?
- You don't express any jealousy. Do you feel jealous or not?
- Am I correct in thinking that your biggest concern is your parents finding out?
- How is her relationship with this man affecting your daughter? Do you think your daughter knows?
- Do you also see other women for friendship and sex? Do you expect to in the future?
- Is she unhappy in general? If so, what does she need to be content?
- Since you discovered all of this, do you argue about it, or do you talk openly, or do you—as the man—just tell her what she can and cannot do?
- Since you found out about her affair, do you and she still play together? Are you romantic when you are home?
If she is not seeing him now, you can take your time to think through this situation and communicate with her about what you feel. Communication is the key. Let her tell you what she is experiencing and feeling, and what she needs. Listen well to her. Then make your decisions about what you can live with.You will make the best decisions when you understand both her and yourself.
tao