A parent’s worst nightmares revolve around harm to or loss of their child. While I don’t know for a fact, I’d imagine the agony increases exponentially if that harm comes at the child’s own hand.
Within the first few moments after my eldest child was born I knew with absolute certainty I could do whatever I had to in order to protect him. Before that day, I wondered if I could willingly put myself in danger or cause harm to another person in order to protect someone. Since that day, I understand completely that I not only am capable, but I wouldn’t even think about it.