A hurt Ayaan when he listen that his brother want to break all the relation with the second family and they are dead for him, he just cries and runs away because he is so hurt that the fear of loosing his brother could not make him hold there.
Asad understood that unintentionally he has hurt ayaan he runs behind him hold him and tells him that the anger was not for him but for his father and since he is part of heart/life he can never let go of him.
Beautiful scene , your take frnds.