Ok, first off, Sam Soon's mom is Crazy! Geeze, you don't have to give her literal bruises to match her heart.
But in terms of Sam Soon, I feel bad but I can't help being reminded of the conditions that she and Jin Heon had made. Yes, he is at fault but I don't really see her as a victim. Frankly, they're both at fault. He made it clear that he didn't want her or any real feelings toward him, right? she agreed, falls head over heels, and professes her love. So now she is a mess cuz he doesn't want her(or so it seems), and she doesn't understand. I'm just having a hard time feeling really bad for her, I want to slap her so she can wake up...