She got divorced because she could not allow and ignore what was going on and could not tell Mr. Choi due to how fucked up the situation was. I'm pretty sure she doesn't like Joowon because she knows his personality and is waiting for her son to snap out of it. So sad, sacrificing her happiness for her son's own good. (/TДT)/ ┗( T﹏T )┛ ╥﹏╥
Especially the one in the cast. I'm pretty sure all the clones believe they are the real one.
Also I have this strange theory that the flower head guy is actually the real one. After all the way the hotel was found, plus the strange and vivid dream the MC had makes me suspect Hyunjin is the flower guy. Plus all the clones when they die burst into petals. Obviously they are clones of the flower head guy. ٩(๑❛ᴗ❛๑)۶
May your soul find rest and peace