A woman never wrote, "Thou shalt not commit adultery." God wrote that. You sin first and foremost against God.
My own heart has to be under constant check by Jesus.
God uses us to impact others.
You can be genuinely forgiven by God and other people but still suffer the consequences from a particular sin in your life.
Any sin you cover, God uncovers. Any sin you uncover, God covers.
You can minimize your sin. Rationalize your sin. Justify your sin.