yeah, it's confusing.... so I'll try to guess based on these two chapters....
The raven hair lady kidnapped the MC who is the baby of the rival "good" family while she was still pregnant with her child.
The rival family on the other hand was already trying to kill off the MC because she didn't have the powers of their family.
Raven hair dies trying to protect the kidnapped child and herself.
Raven hair already had a child and was working on another when she kidnapped the MC. One seriously hard working mother.
Anyhow somebody from the evil family saved the child from dying from the good family knights and decided to tell everyone that the MC is Raven hair's child.
And since this is supposed to be an evil family, I'm guessing the knights from the evil family decided to lie to save their own lives by using the MC.
I know the narrator said "same womb" but that could also mean the "same mother", not that she was pregnant with twins.
I like the art, but MC's speech and inner thoughts are shallow at best. Like she isn't there at all. Instead, she feels like someone who is watching a film and commenting on something unrelated to her.
The duke have so many wifes and kids to the point that if you want to be an heir, you have to eliminate the others? Wow such a trashy family. What kind of mindset thay have to do this sick tradition.