I agree with you completely.
We know the groom's party is being absolutely honest, but how would Jalal know that? He thinks they are lying, and let us not trot out the Rajvanshis never lie nonsense. They have lied often enough, from the days of Jaichand downwards. I cannot understand why the Rajputs protest against this serial, which glorifies them far more than history warrants.
It is not that Jalal trusts Sharifuddin blindly, whatever he might say to Jodha. It is rather that he cannot see what he would stand to gain from such a charade, as he says to Hamida Banu. At first sight, no rational person would be able to understand WHY Sharifuddin would want to take such a risk for no visible gain. It is the same with Jalal. He is absolutely logical in what he says to his mother.
In fact, I too found it very strange that he is doing it merely to take revenge on the Amer royals, plus damaging the Jalal-Jodha relationship, but at a very great risk to himself if ever he should be found out.
For Jalal, it is one man's word, his brother-in-law's, against the two others, for there are no other witnesses, and he does not know the Rat King (the Dhawalgarh Raja, is this not an apt name for him?) and his son as people at all. And in contrast with Adham,whom he does not trust at all, right now he has no reason to distrust Sharifuddin.
As for Jodha, he thinks she is a prejudiced party and is cooking this up to get him to hand over the durg. After all, just 2 days ago, she told him it did not matter to her if anything happened to him provided it did not happen in Amer and jeopardise her sister's marriage. When this is the extent of her caring for his life in comparison with this wedding, why would he think that she would not implicate Sharifuddin to get the marriage back on the rails?
Secondly, the way in which Jodha handles the saboot part in front of Jalal is a carbon copy of the rank ineptitude with which she handles the Rahim aur dature ke ark ki dibbi affair. Drag an unprepared and frightened witness in front of the Shahenshah without any warning and expect them to tell the truth.
Next, what IS the truth to which she wants Bakhsi Banu to testify? Jodha only hears Sharifuddin say to his wife Sab wapas aa jayega. She has NOT heard him say Jab shaadi hi nahin hogi to which preceded it. So how does she conclude that Bakshi Banu is privy to Sharifuddin's fraud?
Finally, knowing Jalal's temper and his swiftness to punish brutally, she should have been able to guess that he would execute Sharifuddin on the spot for defrauding him in such a disgraceful manner. She should thus have anticipated that Bakshi Banu would be what is called in legal parlance a hostile witness. But then Jodha neither has any imagination, nor the ability to put herself in the shoes of another and try to visualise that person's likely reaction. Which is why she always comes a cropper.
This is where her affirmation in the precap is excellent tactics. It will get him to move and try and work out something far more than any accusation could. She shows that at a pinch, she will take his side, and that will touch him more than any of her hectoring him earlier.
His face in the last shot is a study in puzzlement: he is trying hard to decipher this new Jodha Begum. Rajat still has the power to surprise me; that shot was mindblowing.
Shyamala B.Cowsik