When Aaliyah got to know Purab is involved with some other girl (whom she assumes as Pragya), Pragya's marriage alliance was already at Abhi's door. It's only after that he decided to marry Pragya in order to get Purab to realize Pragya was not a good girl. In retrospect, Abhi perhaps thinks Pragya had planned beforehand to get married to him even before Aaliyah came up with her plan!!
Pragya also agreed to marry Abhi easily although Abhi thought she loved Purab. So her plan must have been that she will marry Abhi and get her sister married to Purab!
And when Abhi did tell her that he only married for revenge, Pragya was not even reacting much. Any girl would have walked out of the marriage or tried to fight for her rights. But Pragya rather was playing a good bahu to Daadi from the very next day.
Pragya never told Abhi that Purab loves her sister while she happily participated in Puliya wedding celebrations. She did tell him in a drunken state the possibility of Puliya not happening. So Pragya had it all planned all this while!
Again, when Purab ran away, Pragya told Abhi she knows nothing about it. But she exactly knew since a wedding mantap was ready for BB and Purab the very next day!
Above all this, Abhi had started to think she was a nice girl because of her good deeds that he saw and softened towards her. He covers her back for the whole time and at the same time she was busy betraying him by planning Purab's running away.
This is why Abhi has no remorse over what he did. Because the trap he put on Pragya is nothing compared to Pragya's master plan!! Abhi was only trying to make Purab realize Pragya was a bad girl but Pragya got Purab off of his wedding to Aaliyah and set things ready for her sister's marriage. She betrayed him at a personal level, betrayed his Daadi and of course Aaliyah!
So to him, it looks like he got trapped in his own trap (into a much bigger trap that he couldn't have imagined) and Pragya did everything under his nose without him realizing a thing!!!
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