No matter how much he may profess to dislike her. No matter how much he may think her wrong. No matter how much he may look as if he's doubting her intentions with regards to his money and welath and family and even himself.
He will never doubt Santu's fidelity!
It just won't happen. In his heart of hearts he knows what she really is. And there is no way he will ever believe that she is or can in any way be a loose woman.
DM will vindicate her honour I assure you.
Personally, I hope he does it without having heard her bashan. To defend her after hearing that is easy. To defend her without any knowledge of anything that has come before that moment is to defend her because he trusts her implicitly. And I'm sure where her fidelity is concerned DM trusts her implicitly.
If CV's show otherwise, they are a bunch of fools!