Something stopped her from carrying it through. I'm not fool enough to think I'm that powerful. Something greater than us both intervened. If there's a God, why can't there be a Devil?
What about that scares you?
I have nothing to fear (well...discounting spiders and snakes ).
To answer your question, may I suggest that you look into this wonderful book:
Angel Answers: What the angels can teach us about the world we live in by Diana Cooper
).