from what i remember is that mc was never the golden child— it was the twin sister and that the mc's entire backstory of her being the golden child was all made up, it was actually's the sister's background. mc was envious of her twin and started slitting herself to gain attention , twin felt so bad she began pretending to be sickly so Mc would shine more. parents died and mc erased her memories so she completely forgot she was the "inferior" sister and was convinced she was the genius sister all along.
Truth be told this reminded me of my own family. My sister wasn't satisfied till she outshine and overtook me in everything. I eventually gave in because I was so sick of being a threat just by existing. She was always so dissatisfied and angry with me. I just held myself back and let her run ahead. She calmed down after a few years and these days she has discovered a more compassionate side in her dealings with me
Hey! I'm in no way trying to justify what the twin did, just retelling the spoilers I read along time ago. If you search "[title] novel updates forum" it's very easy to access spoilers. If you're upset about the spoilers please redirect your anger towards the author or the original person who released the spoilers who is "saintifying" the twin. :)

can someone spoil me about this two sisters cause some of the spoilers said that the true villain here is the mc.. i dont get i really, i need some spoiler?? plzzzz