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

Can he survive alone in the street without any knowledge of this world's commonsense?

Mila's mind was filled with anxiety the moment she couldn't find Robert inside her house. She began to think how much Robert hated him for being not the original and blamed everything on herself for why Robert ended up missing.

Mila couldn't calm herself and was comforted by Ethel. She told Mila not to panic and not to blame herself, but it was something Mila could not easily do.

Mila holds onto her head as she feels like she's spiraling down into a bottomless pit where all the anxiety becomes a loud whispering noise, telling her how worthless and stupid she is. The voices are blaming her for whatever bad will happen to Robert out alone in the street.

"I am much older!"