Peter was being long suffering allowing her the chance to repent and get right with God.
Also, she didn’t know what happened. You would think with that tragic of an outcome, she would have heard it from someone, but the enemy always keep us in the dark when it comes to consequences.
He will do everything to not let you know what the outcome of our choices will be.
When temptation comes, all he tells you is the fun you will have, not the terrible consequences you will suffer because of it.