It blinks like a small still voice. They Knock it out and keep driving. No one will know for awhile. Not until your engine burns up. Then when the internal motor of your conscience is melted down, you will fall fast and deep into sin and death.
Sin is the transgression of the law.
First by the mind and then the deed. David instigated this villainous sin. The blame must rest squarely on David. It does seem that Bathsheba was a contributing factor. She undoubtedly knew that her bath site could be observed.