How to Avoid Becoming a Cruel Stepmother

The child my friend gave birth to was the main character of a fantasy novel I read in my previous life. Not long after his birth, this poor child grew up with an indifferent father and suffered abuse at the hands of his stepmother. He left home only to proudly return when he became an adult and condemned the evil stepmother. "He's such a pretty boy, and I feel sorry for him. If it weren't for Amanda." [What?] My standing steps while holding the child stopped. [Amanda_Amanda...] Amanda, that was the childhood friend of the main character's mother, a native of a Korean-American family. That was my name. "I'll be Marilyn's duchess, at least for her sake." And, maybe, she can be a stepmother who doesn't mess with this child? How not to be the evil stepmother, Amanda, abuse this child even if she dies. Can Amanda be a good stepmother? Can the Duke, a cold northern man blowing a cold wind, and Amanda be good parents?