So far, I am starting to think that Eun Yi-Soo (Eun Hwan-Ki's sister (EHK)) had something to do with Chae Ji-Hye's death. It makes no sense that she would kill herself just like that, especially given how much she loves her family. Eun Yi- Soo displays traits of someone with a personality disorder and it is fair to say she might also suffer from a mental disorder like EHK. It is not uncommon for traits of mental disorder to pass down among family members.
What do you think?