Regarding DK and Vedant being brothers

This letter Vedant is writing to Disha, does any one have any idea what will be written in the letter? I have a feeling it'll be his resignation letter and it'll explain why he never told her that he is DK's brother.

I also think that theres some story behind Vedant maybe some kind of grudge or something he holds against DK.

What also makes me curious is does DK know that he has a younger brother, I mean they have shown it as though he doesn't know but maybe he does, just never mentioned it because he hates gargi so much for what shes done to his parents that its caused him to be filled with bitterness towards Vedant.

What do u think?

Shaheen

vedant's last name is vadhera, that means Gargi got married again, vedant most likely has a different mom and dad from DK,

so how are they brothers, they are not even related to each other properly.

Gargi WAS married to DK's Dad, and i think they got divorced, and vedant is not DHURV SEHGAL'S SON,

OR IS HE?

IF NOT, THERE IS NO BLOOD RELATION AT ALL!!!!!!!!!!!!

so ISN'T vedant disha's brother in law?