The Director has MAJOR issues! She's got major bolts loose in her head! She does not realize she is hurting her only son/child with her crazy antics! I feel for Geum's birth mother. She probably was forced to give her up and/lied to.
Just give up and let him marry her already. And, so what if she takes her birth mother's side? She didn't have to be that harsh with her about it, though, I could see why she would want Geum to take her side.
I've never seen a mother like this person, she cares nothing for her son's happiness.... maybe she should just drink the rat poison, then she couldn't dominate her son any longer....sheeesh!