Paradise and tree

I like the dialogue said by Na moo and Nak won ,"Even a person like me ,there is paradise","Even a person like me there is a tree to lean on ".. But I didn't understand his brother why not close to her ..When Na moo was not there with her ,her brother always next to her and always support her ...But she feel safe and secure when Naa Moo next to her ...May be childhood affection,likeness and bonding was too strong that not a single moment they forget each other ...Some more dialogue I liked "in this way our nightmare like story will come to an end.