King David's excursion into adultery reveals that, regardless of one's state in life, one cannot commit it without damaging relationships any more than murder. II Samuel 12:9-14 describes the cause-and-effect process.
Sin produces two overall effects: First, because of the breach of trust, it creates division between us and God (Isaiah 59:1-2). Second, it produces evil results in the world. Upon true repentance, God's merciful forgiveness cancels out the first. However, the second remains, and the sinner must bear it and - tragically - so must those caught within its web. As a result of David's sin, five people, including four of David's sons, died directly or indirectly: Uriah, the illegitimate baby, Absalom, Amnon, and Adonijah!
But the punishment did not end there. II Samuel 16:20-22 relates another step in the unfolding of this sin's effect:
Then Absalom said to Ahithophel, "Give counsel as to what we should do." And Ahithophel said to Absalom, "Go in to your father's concubines, whom he has left to keep the house; and all Israel will hear that you are abhorred by your father. Then the hands of all who are with you will be strong." So they pitched a tent for Absalom on the top of the house, and Absalom went in to his father's concubines in the sight of all Israel.
II Samuel 20:3 adds a final note on this event:
Now David came to his house at Jerusalem. And the king took the ten women, his concubines whom he had left to keep the house, and put them in seclusion and supported them, but did not go in to them. So they were shut up to the day of their death, living in widowhood.
God prophesied it, and Absalom and Ahithophel used it politically to discredit David and elevate Absalom. It illustrates Absalom's disrespect for his father, which was at least partly rooted in his father's notorious sex life. Did the adultery make the concubines' lives better? "Can a man take fire to his bosom and . . . not be burned?" (Proverbs 6:27). No, he cannot. Not only is he burned, but those close to him also suffer because this sin's penalty reaches out to destroy what should be very dear and cherished relationships.