That was the weirdest forced ending of a cheater ever. It made no sense at all after the stepmother was had dead to rights. Retarded mother says, "respect the woman who took my place?" Give me a break.
Besides being a chuunibyou exercise in OP idiocy this manga's path of forcing "democratization" emphasizes everything that is horribly wrong with western culture. e.g. "Kill your king or we'll do it for you and you'll have sudden utopia." Anyone who offers utopia is probably planning a dystopia...