Exactly! Retribution is calculated, and while it's usually just, that doesn't mean it isn't harsh - it's proportionate to the offense originally committed, and the worse the offense, the worse the retribution for it. It's no wonder Edmund is scary, if that side of his character is somehow evident to the average person (e.g. Tebbitt). Almyra's Edmund has this quality in spades, too; somehow you always get the sense that her Edmund is more than willing to go after anyone who hurts any of his family, in any way. Even when he's not actively being Scary Edmund, he's a little scary.