"and a man find her in the city": If she had not gone about in the city, this would not have befallen her
— "The breach beckons to the thief." "and lie with her": any kind of intercourse (natural or unnatural).
(Ibid. 24) "Then you shall take out both of them to the gate of that city": to the gate where she was found and not to the gate where she was judged.
"and you shall stone them with stones": I might think with many stones; it is, therefore, written (Vayikra 20:27) "with a stone." If "with a stone," I might think even with one stone. It is, therefore, written "with stones." Say, then (that the meaning is) if they do not die with the first stone, they die with the second.