Cecilia. Parote was looking through his father's office, through some old books and he found some set of pictures which his father took w/ the King of Chiangrath. To get more information out of it, I think he met up with one of his father's elderly friend who acknowledge the guy standing next to his father as "King Saenluang of Chiangrath." He confronted his mother w/ it and of course in the incident, the secret leaked.
The older brother is adopted and he doesn't have the Rachasena last name. So legally, Parote is the eldest son, the true fiancee of the Princess. In today's episode Parote argue w/ his mother because she claim to have rights over the Silamanee since she will give Pipope to Chiangrath. And w/ Pipope feeling like he is in debt to the Rachasena (since they took him in when he was small), he will have to go marry the Princess whether he wants or not. Ohh...but Parote stood in and threat his mother. He's the real eldest son and if the mother don't give back the Silamanee then he will marry the Princess. Keke. So the mother gave him the Silamanee BUT...throughout episode 6, she was trying every and each way to make Parote sympathize her and delay the process of him getting the Silamanee back.
Episode 5-6 was kinda steady and layback. They're focusing on more w/ Chalee and Sasi character now. I'm starting to feel bad for na'ek mother now, since she wants to patch things up. She went to see Ngam at the university, she tried to approach her daughter but each step she took forward, Ngam took a step back. She called her "aunt" and also pretend that she didn't know her mother, then excuse herself and walked off, she's so cold...
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I think this scene will be in episode 7. I can't wait to see it!