Maybe RVs father was falsely convicted by Mr.Hooda for a crime he never committed. Mr.Hooda is a big lawyer with least ethics & RV was all helpless at that time probably because he wasn't powerful nad belonged to a poor family. In this angst & desire to take revenge upon him he must have become a CBI officer. Probably that is why he is using the same tricks of providing false evidently against Anjana, something what Mr.Hooda must have done early to win the case against RV.
That is why he is using AdiYa to make Hooda's suffer his past's actions consequence.When Adi left Zo with those divorce papers. .his lines to Zo were of consequence as to how it feels when you have lost everything in the world.Maybe RV lost his parents to Mr.Hooda's false conviction.
I hope CVs show this. Half brother theory is far fetched IMHO