You're missing the entire point of the story of the woman caught in adultery. Lev 20:10 prescribes the death penalty for _both_ parties, man and woman. The scribes and Pharisees brought Jesus a woman, alone, saying she had been caught in adultery. The obvious question is "With whom?" and also, "How did these super-religious types know where to find an adulterous woman?" It's not unreasonable to suppose one, several, or all of them had slept with her and were under the death penalty as well. Else why would these men, hot on the idea of stoning, be stopped in their tracks?