Purpose of Rehaan-seher tract / has to be connected to Sahil

I was thinking, I Rehaan knows that the girl with him is not Sanam, they what could be the reason behind it.

I think, aahil would see sehaan of ether and be under the impression that it's Sanam. And when he confronts her, she would deny and he would think she is lying. So we have a lot of confusion coming our way soon.

Let see how they make these fights and misunderstandings hot and enjoyable for us.
Put your thoughts in words and see if we can predict what's going to happen.