Why Jr NTR skipped Nandamuri wedding?

Nandamuri Balakrishna's second daughter Tejaswini got married today and this auspicious event was attended by many biggies from film and political fraternity. However, one question has aroused among the Nandamuri fans, movie lovers and in the political circles. Why Jr NTR didn’t  attend the event? No one has the exact answer for this question. If some say that the actor has not been invited, some differ by saying that Balayya has invited Jr NTR and the later didn't turned up for the event. Is NTR busy with his Ramayya Vasthavayya shooting? Or his differences with Chandrababu Naidu and Balakrishna made him to stay away from the event? The answers for all these questions are best known only to Jr NTR and Balakrishna.