why ddont he agree to prem-heer's rishta da... just bcoz he thinks that heer is not balwants daughter..and he is so stubborn that he will not allow their married life.. prem is just like him...... if he does all this and then ask heer to leave prem and go and then he finds out that she is balwant's daughter.. and by that time she would have married either rr or manmeet... what will happen then....
i am sure this is goin to happen.... what do u guys think