No Adulterers go to heaven
"Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor male prostitutes nor homosexual offenders nor thieves nor the greedy nor drunkards nor slanderers nor swindlers will inherit the kingdom of God" (1 Corinthians 6:9-10).
Looking on men and women lustfully is adultery
"You have heard that it was said, ‘Do not commit adultery.’ But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart. If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. And if your right hand causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to go into hell" (Matthew 5:27:30).
Beware of seductive men and women
"My son, give me your heart and let your eyes keep to my ways, for a prostitute is a deep pit and a wayward wife is a narrow well. Like a bandit she lies in wait, and multiplies the unfaithful among men" (Proverbs 23:26-28).
Marries a wrongfully divorced person commits adultery
"It has been said, ‘Anyone who divorces his wife must give her a certificate of divorce.’ But I tell you that anyone who divorces his wife, except for marital unfaithfulness, causes her to become an adulteress, and anyone who marries the divorced woman commits adultery" (Matthew 5:31-32).
Divorces and marries again commits adultery
"I tell you that anyone who divorces his wife, except for marital unfaithfulness, and marries another woman commits adultery" (Matthew 19:9).
Adultery can be avoided
"Above all else, guard your heart, for it is the wellspring of life" (Proverbs 4:23).
God can forgive adultery
"And that is what some of you were (adulterers, etc). But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God" (1 Corinthians 6:11).
David confessed his adultery, and God graciously forgave him (Psalm 32 & 51).