This is my POV of what will happen in this show. I think that Tani will not marry Sushant because his last name is Roy not Besu like what it said her last name was in the beginning of the show.
I think what does happen is that Sushant helps Tani become a very big singer. Anu does marry Naupur and because of this Tani leaves and goes away. During this time that Tani is away Anu and Naupur's marriage breaks and they get divorced, because she ends up cheating on him and she no longer wants to say in India.
Sorry I have to finish my POV later, got to go to a meeting