The og!Sernia was actually inocent and was cursed into insanity and DEATH by the Nanny because her existance stopped the Nanny from having her cake and eating it too (keeping her cushy job and having her child in the mansion with her) and when she tried to curse the FL too but was foiled by the butterfly effect the FL begged the Duke for the right to judge her and she just fired her arggghhh, before the FL keeps going on and on about how it was og!sernia fault that the twins where ruined and all the deaths caused by them, but yet when the true culprit was there she let her off freely, she released into the world the kind of person that will curse a blameless CHILD into insanity and even worse that woman was completly unrepentant, was only sorry she did not succed and was discovered and did not came across as particulary mentaly stable, what the heck FL?! I actually feel sorry for her child that now will have her under the same roof (I actually really hope the Duke had her killed or imprisoned behind the FL back), and no, just firing her its not enough for literally cursing a CHILD a fricking child under her care and failing, its like saying that a babysitter should just be fired after she tried to shoot the child and only failed after she pulled the trigger because she got scammed with defective bullets. That offence if not punishment deserves at least containment from society (via jail or mental institution)

Later on inmediatly forgiving the girl that over some jeaolusy endagered her life and made her relive her death trauma was more understanble since at least that one confessed on her own and was truly regretful since she intended to humillate her not kill her, but still this its setting a very annoying pattern

from some "reason" he cant explain saved the FL from drowing even if he will had normaly just had watched anyone else drown and he is drawn to her eyes *rolls eyes*

I saw a review mentioning the MC easily forgiving the nanny who cursed the original soul. Actually, the nanny tried to curse the original soul but didn't really succeed either in the original or in the current. Basically, a curse requires an equivalent sacrifice and the nanny didn't have enough money to pay a sorcerer for a real curse. She got cheated by a fake sorcerer. In the original novel, Sernia was jealous of the twins and very sensitive to how she is treated. So she noticed the nanny didn't like her and checked her room. There she found the cloth doll and killed the nanny on the spot because of which there was no chance to question her or find out the truth. So eventually when they found the diary, hair and earring, the blame fell on Sernia and she had no way to prove her innocence. She was distraught and killed herself. While the nanny was a trigger for what happened to Sernia, she wasn't right in the mind already. So, firing the nanny and keeping her from getting any more high paying jobs is a suitable punishment for what she was trying to do.