This touches on one of my fundamental problems with Diana -- there's no feasible way what Danny did should of itself in any way, shape or form present a problem to her.
Societies require laws; as she herself says in this story, the way of the Furies was the law "3000 years ago".
Heck, the whole idea of supernatural caprice and law and the development of human justice was addressed by Aeschylus in The Libation-Bearers and The Eumenides millennia ago.