@TheFiller
She is clearly shown objecting at the end up chapter 1 but nobody listened to her. So saying that she said nothing is just plain wrong.
Could she have tried harder? Maybe, we really don't see what happened immediately after. But keep in mind that she's trapped in an incredibly abusive family and is probably afraid to speak out (and not without cause).
Either way it doesn't change the fact that the MC's actions, though well-intended, were also incredibly foolish. And that's entirely on him.