I don't think Abir would get to know of Meenakshi's conspiracy and her condition for Mishti . He would only know that Meenakshi asked Maheshwaries to do away with Mishti for the marriage and Mishti wont tell anything to Abir.
And so far Parul revealing Kunal's truth is concerned that's never gonna happen. Mishti is the female lead and only she would unravel this mystery post her marriage with Abir, whenever it happens. In fact cvz can build another break up track for Mishbir. As Kunal would be too hurt after knowing he is illegitimate and Abir would somehow be annoyed with Mishti fior not sharing details with him. (I somehow feel they will bring this revelation track after 5 or 6 months)
The airport scene is not a propose scene as confirmed by Rhea.
I think Abir would get Mishti's letter and would stop her but the truth wont be revealed. Maheshwaries wont know why Mishti behaved weirdly that day but they would be glad when Abir would get Mishti to attend the wedding. They wont know Kunal ran away from marriage. Abir would hide it from all may be he even wont tell it to Mishti (Provided they don't search for Kunal together)
Kuhu would be the last person to know that Kunal left her at the mandap and Mishbir/Abir got him there and may be Meenakshi would tell it to Kuhu post marriage.
I don't see Meenakshi getting exposed in near future, and I am pretty irked about it.
Mishti would hide it and Abir wont know the whole truth and he wont like to hurt Kuhu.
What do you think?