Hyesung's dad is abusive and looks down on omegas. His mom had enough and left. The dad treated Hyesung like shit and is the main reason for a lot of his traumas. The mom saw some paparazzi pictures of Hyesung, Dojin, and Byul. Ig she felt guilty and wanted to reconnect with Hyesung. Hyesung asked her why she never came back for him. She says she met someone new and didn't want him to know she had a child and blamed Hyesung for never looking for her either. Dojin was there for the whole argument so he knows why Hyesung never wants to see his mom ever again so funding his mom behind Hyesung's back is suuuper bad.
Tldr: Hyesung's parents suck and so does Dojin

Can someone give me a brief summary of what happened with hyesungs mom since I haven't read love is an illusion. I got bits and pieces of what happened but a full picture would be great!