Even if the princess didn’t bring her back she will still go out of control from the abuse and mistreatment as u can see from the first or second chapter I think. if u actually read and look properly. Also she a princess, she show kindness and bring someone in and give her opportunity in the balance but it’s not mean she have to look after her. Also she doesn’t know about the abuse to that level, only know that the palace not that welcome her. And of course she gonna be scared of fleta since she is the one that killed the whole palace which is her home. If I kill ur family and destroy ur home, I don’t think u be as nice as the princess. U’ll be even more of a scaredy-cat and a loser then princess
Wait, huh? Did I misread the story? cmiiw but MC didn't bring Freta to her house and abandoned her,, Freta has always been residing in the palace, but was instead kept to where the maids reside. I think when MC found her, it was by coincidence and she offered her help, and not quite literally brought her in her residence like what she did in her regression.
The full details of what happened in their past life isn't revealed yet so we don't really know if MC truly did nothing else (especially when she came to k ow that her sister was the mastermind behind the abuse).
Also, yea, I think it would be normal to worry if Freta would end up like before. Idk why she wouldn't— it's common sense to worry about making a mistake as you try to atone for being a bystander in the abuse. She's scared because she knows she's also one of the cause of it. The two situations aren't mutually exclusive. Though I think despite all that, she did eventually develop genuine affection for Freta as her younger sibling.
Imagine bringing someone to your house, only to abandon them for 6 years, not even caring to check whatsoever, only for them to be abused and drown in darkness. Now regressed back to 6 years, you are scared the person you brought in would still go ballistic like how they did in your past life, which actually you are the cause for that to happen lmao. Smash or pass? Pass.