Episode was blah...
Well ! Adi does deserve to be put behind bars for leaving Roshni in the park and almost pushing her into human trafficking if not for Raman and Ishita.
Secondly, he turns to the girl who he paid two hoots . He did not even take the responsibility of following the annulment papers procedure - he could have easily kept a check on it by appointing a lawyer but he was content and became guilt free by simply signing annulment papers and then forgetting about it, no follow up.
Roshni might have not opened her mouth for 2 reasons :
1) Her mother was there who is her weak point and she knows if she refuses then her mother and sister might suffer at Khandpur.
2) She will have no choice but to leave for Khandpur once she talks about her marriage being cancelled, she had always voiced that she wants to keep the marriage for namesake to be distant from Khandpur.
Mani's panic reaction - "well Mr Mani ! It was you who was blaming Ishita for revealing the truth and without confirming the annulment papers you went ahead with the marriage, so basically you are somewhere down the line responsible for your daughter being the other woman."
Last but not the least - why is Gagan still holding on to Roshni and Adi's forced marriage as a punishment for his brother's death even after seeing Roshni's reaction is out of my understanding. He can easily put murder charges against Adi and it will not be possible for Adi to come out of it as only Adi, Gagan's brother and Ashok present at the death place. Ashok would never testify the truth as it would prove he is the actual murderer but he would be more than glad to testify against Adi stating that while talking on his phone he simply switched on the gear without double checking the meaning of Gagan's brother's signal.