No temptation has overtaken you but such as is common to man, but God is faithful, who will not allow you to be tempted beyond what you are able, but with the temptation will provide the way of escape also, so that you will be able to endure it. - 1 Corinthians 10:13

When you violate your marriage vows: you violate God's word, break your spouse's heart, embarass the cause of Christ, live with the fear of exposure, and trade short-term pleasure for long-term pain.

So before you get involved, seek God's help and stand on his Word. 'Give honour to marriage, and remain faithful to one another.

Marriage is to be held in honor among all, and the marriage bed is to be undefiled, for the sexually immoral and adulterers God will judge.- Hebrews 13:4

Therefore, consider the members of your earthly body as dead to sexual immorality, impurity, passion, evil desire, and greed, which is idolatry.- Colossians 3:5

Let us walk properly as in the day, not in carousing and drunkenness, not in sexual promiscuity and sensuality, not in strife and jealousy. But put on the Lord Jesus Christ, and make no provision for the flesh in regard to its lusts.- Romans 13:13-14

That is why I say to run from sex sin. No other sin affects the body as this one does. When you sin this sin it is against your own body. Haven’t you yet learned that your body is the home of the Holy Spirit God gave you, and that he lives within you? Your own body does not belong to you. For God has bought you with a great price. So use every part of your body to give glory back to God because he owns it.- 1 Corinthians 6:18-20

If your toying with the idea of having an affair, or you're already in one, or you're trying to get out of one, stand on the Word of God today and believe Him for victory.