MaryahLu

"Why do the main character's parents often get the short end of the stick?"
That is what Mila asked while looking up at the sky. She was grumbling toward whoever sent her inside the novel she read before she died.
She becomes the mother of the main character, whose parents are both dead. Mila's character was merely a tool for the MC's character development.
It's a simple, fix-all solution. The author wanted to make the audience instantly sympathetic towards the main character, and the best thing he did was to have the MC's parents die.

After she avoided her death in the original plot, death flags kept coming for her. 

Will the original plot not end if she's not dead?

....

proofreader: Aserehtam

Main character's parents must die

Robert and Christopher don't know why they are fighting as they turn the whole front yard of the castle upside down.

Christopher was using his sword to defend himself from all the big attacks Robert had been launching.

"Strange, the Duke of Aston is inelegantly turning this place into ruin, but these side characters are acting as if they are not seeing anything." Mila nonchalantly commented.

She also pitied some side characters who were unintentionally struck by the two's attack since they were too unaware of their surroundings.

"I didn't see that. I didn't see that." Mila mumbled to herself as she convinced herself to forget about the side characters that she had seen had been uselessly killed.

She then focused her attention on the two dukes fighting in midair.

"Treat my son well."