So she was a shit person even as a child? I remain convinced the way to solve this is to just stab her till she dies. There is zero value in her character.
And holy shit the dad is also trash. How can you listen to your child say things like that and not immediately shut it down. This is literally parenting job 1: make sure your kid has fucking empathy. Maybe he thought having a lil brother to protect would change her but what if she hadn't become enamored? What if she had killed the baby because it was weak? She literally turned out the same as she was as a child, still not giving a shit about anyone else, only now she has the added "I will abuse my little brother" mixed in.
The more I learn about his family the more amazed I am that he didn't turn out to be a shitlord like them.
Or it's bad writing. Can we go back to cute clumsy tiddycat yet?