Reincarnated as the Scariest Stepmother in History?!

One day, Chitose wakes up to find that she has been reincarnated as Claire— the villainess known as "the most feared evil woman in history" from a novel. Claire was forced into a marriage with Duke Vermilion, the "Grim Reaper of the Battlefield," and is destined to be executed in the end... Chitose is bewildered by this crisis, but then three adorable children appear before her eyes. Chitose, who loves children and once aspired to be a nursery teacher, feels her heart soar at the sight of these children who never appeared in the original novel. But the children are clearly afraid of Claire. Meanwhile, her husband, Duke Vermilion, returns from the battlefield and shows no interest in Claire or even the children... Can Chitose turn this cold, broken family around?