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 can't believe his eyes and ears.

What he was seeing and what his ears had heard was like a lie to him.

Robert can't believe a former princess, warrior, and duchess is bowing and kneeling in front of him, despite the fact that Mila has a much greater status than he does.

He doesn't know what kind of plan or play Mila is up to, but he doesn't like it, even though he hasn't heard of it in its entirety yet.

Robert shouted as they were now both kneeling while facing each other, and all he got from Mila was a loud sigh of disappointment. As if he had done wrong, Mila talked to him scoldingly.

"The creator has favored you."