We know that there is a history between Taru and Khanji and he had a child. But we are ASSUMING that the child is his and Taru and that it is either Hiten, Khemi or Santu.
Why can't the child just be Khanji? Maybe he was married or widowed but had a child.
If any of them, Hiten, Khemi or Santu, is just Khanji child and NOT Taru then we can have Hiten and Khemi marriage for there is not blood ties:
If Hiten is Khanji child then he is not related to DM that means Santu is not his mother so Khemi is not his masi
If Khemi is Khanji child then she is not related to Santu and can't be Hiten masi
and finally if Santu is Khanji child then she is not Khemi sister.
So there we have it 3 possibilities that allows the marriage of Hiten and Khemi-but whatever they show I like the fact that Hiten stood up against everyone for his love-why can't REAL men be like that!