I think mishti will stop herself on kuhu saying or seeing family happy to not complicate things further
And will respectfully put her POV and abir will be heartbroken and will think mishti actually has no feeling for him
But as always bigben has a habit of foiling her own plans and she will give the idea of mishti marriage to maheshwari as she is elder sister as bigben really don't want kuku marriage
So she will give idea for mishti marriage first but this thing will trigger mishtiwhen the new rishta will come just a cameo like chauhans but she will finally confess in front of whole family
And menu ka tie tie fiss now she has to marry both unwillingly with smiling face not able to do anything