In a way... I understand why Nok turns into a total B when she finds out the truth. Imagine losing trust with your childhood friend (Nai) and finally, being able to trust him again, even falling in love with him, only to find out that he had a secret past with your future stepmom. I personally would feel betrayed, especially since I don't forgive easily, and for a person like Nok who puts herself on a high horse. Its like wow, this guy i lost my trust for, im falling in love with him again, and just starting to trust him, is betraying me again?! Im getting angry just thinking about it lol
I truly believe if Nai would have just told her from the beginning, things would be different. She'll be angry, but not episode 7 angry. But Nai actively tried to hide his past with Khae from her. Hopefully her being a total B won't push Nai too far away. For now, I am kinda on Nok's side... I might change my mind later. Cause Nai has been nothing but sweet and swoon worthy these past episodes.
Sorry for the rant guys.