Well the good thing is she did not change any of his studies except the poison. But also, it is understandable that someone with her background wouldn't let a child drink poison, especially if she believes that this also contributed to him becoming a vilain. She is too kind and too modernistic to think the same way they do.
Ya. I was thinking that that was what it was. Her mentality is very much IRL, and not by "the novel".
Unlike other stories where they use the knowledge of "the novel" and use that in their advantage. Here, She basically throws the knowledge of "the novel" away and acts her own way. Which I don't know if it's gonna be a good thing or bad. ( ̄∇ ̄")

How could you not know the sole reason why Ain is doing all those things that you're stopping him. I know you think that they result in him turning evil, but you can't just one sidedly control ain's life. At least know what Ain wants ( you yourself even said that you value what Ain wants) but you're not even doing the same for ain's studies. What makes you think they're not valuable? There's a reason for everything and one must question everything before taking any action. You're just annoying everyone. I'm worried that by the time Ain needs that poison immunity, he'll get hurt instead because of how dumb you are being right now. Please improve soon, poor Ain.