One thing I truly believe - no matter what Pragya says Abhi's faith in her won't change. He has such deep feelings for her that Inspite of rejecting his proposal earlier and then uselessly misbehaving with his daadi, when Abhi understood there was a plan and dint mistrust her - what are the chances now ? Now he knows how strongly they both love each other and as a character abhi is anyway very trusting and forgiving of his loved ones (Aalu occasion, forgiving Purab the first time)
So I don't think under any circumstances abhi will not trust her - chances are he will trust her and know she must be doing this for a reason but not figure out the reason and let himself be hurt by her actions- basically he will just be vulnerable before her and seeing him suffering she will cry silently
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