As for K and his love i dont know. there is more to it.
But honestly speaking. this attitude doesnt make sense. atleast not against Piya. if she cant act nice she can atleast stop bothering no matter how se has turned to be the ne who saved her should not be in her target list.
and also, whatever it is, i am honestly not that intrested. we are not here to watch a family drama. its a dark supernatural lovestory. screenspace should be on that rather than some sidecharcaters dragged change.