Tbh i don’t think she knows. I saw somewhere where her little brother told her about what he was doing to him but she wasn’t in her right mind and slapped him cause she was overwhelmed, but i could be wrong. Tho let’s hope she defends him when she finds out.
nah she 100% doesn’t know, the scene where she slaps him was for a completely different reason and though wrong still understandable given the context (you’ll get what I mean)
yeah i just saw a spoiler and it was a completely different reason
She doesn't know.
i already suspected it but honestly the little brother is right hating his sister. she may not be a bad person but she's a chronic people pleaser and she already probably didn't defend him when their cousin was molesting him as a child (she looks like she knows what happened and still let him stay in their home as an adult) so if that's the kind of stance she's taken about the brother situation he's not wrong for thinking badly of her (imo)
edit: just to clarify, i personally don't hate the teacher character i'm just talking from the brother's perspective