Like the fact that she lost her husband and son(?) before becuz of that similar line of work with taekjoo and Taekjoo being caged by a ridiculously handsome psychotic Russian guy in his private manor is just so sad. That's what she's been worried about for Taekjoo becuz of his work, she's scared that she might also lose Taekjoo too(/TДT)/ AGH MY HEART HURTS FOR THE MOTHER
In the novel Taekjoo's mother went to the police and asked for help to track Taekjoo down when she couldn't contact and get ahold of him for days and months, then she got informed that his son has become an international criminal. She was so worried sick for his missing son just to learn her son has become a criminal, she doesn't even know her son's real job identity so just imagine how worrisome would it be for her. Poor woman
Mrs. Kwon didn't actually know Taekjoo's real job cuz he never told her to avoid worrying her too much (after all of her trauma with her husband and firstborn son), all she knew was Taekjoo works in a public service (I forgot the exact job mention in the story) so just imagine how worried and traumatized she must be after losing contact with his son for months then getting informed by the police that her son is an international criminal.
Vol 1-4 is in AO3
https://archiveofourown.org/works/77328456?view_full_work=true#main
If u have telegram I could send u the vol 4 and the sequel of CA: 'Nameless Star'. I have it in epub.

Urgh! I am starting to hate this man (Yergevy or whatever his real name is), I hope our poor Taekjoo escapes this freak and run away to Korea and life a peaceful life. And I hope that insolent idiot regrets treating our precious Taekjoo like that, Taekjoo should never forgive him. I hope Mrs. Kwon is doing fine. T_T