This should do it, I'd say. Most states are "no-fault" divorce states, but many states still have adultery as a [rarely charged] felony on the books. Even in the context of a no fault proceeding, adultery still matters to some family court judges. In your case, you have rock-solid evidence. This may affect the court's decision on custody if the adultery affected any minor children.
Also, many judges will provide a premium to the cuckholded spouse in the property division. Your family law attorney can go over your options in this regard.
Good luck in this difficult time.
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Looks like no fault divorce in South Carolina requires the parties to live apart for one year in order to proceed with the divorce. Adultery is grounds for a "fault" divorce, which presumably allows you to waive the one year period. Often, a court will need more than a confession to a party that he committed adultery. If there are any documents related to his resignation, they may be helpful, as well as a sworn statement or testimony from the woman he had an affair with. Also, hotel receipts from their meetings, etc. could be helpful in establishing the relationship. A divorce attorney may work with an investigator that can help you gather any evidence you need.
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To prove adultery in South Carolina you have to show inclination and opportunity. Here he has admitted the adultery, you know the other party and they are still involved. That is sufficient for an at fault divorce. The marital estate will probably be divided on a fifty fifty basis even though he is the at fault party. You will get custody of the children and he will have to pay child support. You will need to contact a local attorney and have him file in the family court.
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