Also (going off what u said) the mother also sounds like she was also forced to have sex with him... So they were both victims. I would say she was stupid to call her bio dad when she died. She should have found someone in the community to take care of her.
My best guess would be she probably assumed that the duke would be the best person to protect his own daughter from the schemers. Instead he handed her right on a silver platter what was more than likely intended from the start of this fucked up plan. Although he didn’t know that was their goal. He could have just ignored the letter but he wanted to use her.
This level of cruelty lead to a child ultimately leads to someone’s death. I wish someone would point this out his dumbass and his equally dumbass kids.
F EMPEROR THIS IS HAPPENING BCS OF THHIS BASTARD EMPEROR
Just read through the spoilers for the novel on novel update. So might not be 100%
Why does the Duke hate his daughter?.
.
.
.
Fls mother was forced to rape the duke by the kings brother.
It seems to be part of a fucked plan to have the kid that is produce from this to marry within the royal family. The fls mother was actually priest or noble that have powers from another nation that the royal family took over. Only the emperor knows this.
So yes he is justified to hate her but his hatred for what happened to him is misplaced.
As well as her coming to the house he brought her there to protect his youngest daughter that is his fault. If you can’t stand the sight of the her leave her on the street.
I believe he is also aware that the emperor set him up, but instead he blames an innocent child for what led to her birth. He decides to punish another victim of the emperors crimes instead of the man himself simply because she is weak and powerless and the true villain is strong and powerful.
Source: https://www.novelup datesforum.com/threads/do-your-best-to-regret-최선을-다해-후회하세요.145979/page-2#post-7234717