The story of the woman caught in adultery is obviously later than the New Testament, if you accept the fact that the earliest Greek manuscripts are the most reliable.
But this lovely story sounds so much like the Jesus we meet in the rest of the gospels that I cannot give it up.
I cling to the Jesus who condemns religious hypocrites, forgives sins AND says Go and sin no more.
Is it wrong to take the story as genuine and believe it be part of the Christian gospel although it is not part of any of the original gospels?
It seems to be a very different kettle of fish to the longer ending of Mark, which would appear to have been written to harmonise Mark with Acts and which could be taken to be encouraging us to drink poison and pick up deadly snakes.