can someone explain to me why exactly she can't just, ya know, tell people what her step-mum and step-mum's evil spawnling have done thus far and get them all thrown out? I mean, even if events go public (which is doubtful, with non-corrupt nobility running the show stuff like that tends to get made hush hush and the bad nobles just...disappear...but if it does) she can paint the story that she was a young girl abused and afraid, but grew up and took back her own life
obviously she doesn't talk about the whole reincarnated person and story world events side of things, but they've already done enough bad stuff, physical and mental abuse, keeping her out of society, almost certainly abusing the position she is probably meant to hold until her brother's return and wasting her family's assets (they seem to have been buying a LOT of dresses jewelry etc for miss no noble blood spawnling while they obviously haven't been buying her anything after all). shouldn't she be able to get help and get them kicked out now it's been made clear she's not ill or stupid?
but no, she hides the fact she (well, or at least her body before she incarnated/remember her past life) was abused by step-mum and aims for living free? I mean, if she was planning a more personal revenge, I'd get it, but she seems to just want to escape them and live freely, so why not get help asap?