First and foremost, I still believe Chandni is speaking the truth. After today's episode, its clear that Padam Singh was evil. But he has hidden that face from his daughter, and so she believes that injustice was done to her father.
I'm wondering though, how did Bhabho come to know all this? Then it got me thinking, that maybe her hubby somehow found out Padam's truth and confronted him abt it. Padam Singh then probably realised that he had to get Bhabho's hubby out of the way otherwise his entire mission wud go haywire. And that drove him to kill Bhabho's hubby. And it was Nahar's grandfather who sent Padam to jail... (I wonder why they kept on telling us that Nahar's father sent him to jail... which is impossible, becuz in today's episode he was completely drunk and wiped out to have escaped from the fire)
So Padam Singh went to jail with that revenge at heart to destroy Nahar's family, becuz he lost everything he worked so hard for... and now he's back to get back all that wealth using his daughter. Maybe when Chandni was growing up, he painted a completely diff pic to her so that she also has anger towards that family.
It was very obvious that Chandni was oblivious of her father's doings. So all the things she has been doing so far, she did it cuz she was driven to it by her father. And this... Nahar will realise too. And that is going to bring him to a crossroad, as to whom he wud choose. By law, Chandni is his wife, who maybe hasn't done anything wrong. So it wud be difficult for him to give her a divorce. And on the other hand there is Saloni, whom he also married, and also loves her. And now maybe she is obligated to her, becuz she brought Devika's truth out.
So what Nahar will do now, is all up to the director.