"He who is without sin cast the first stone."
I always had trouble with the whole story. First, the story was added after the gospel had been written. Second, Jesus wants to have it both ways, want to uphold Jewish law in other stories and break Jewish law here. Third, what's wrong with judging the wrong doer, even if you are a wrong doer, especially if repentant. Our justice systems will never work if we were to heed the advise here.