The truth about Ishaan may come out the day of or the day before Meher is supposed to marry Akshat. Abeer will probably confront Meher and threaten to take away their child if she goes through marrying Akshat, that in all likelihood will be how Meher and Abeer end up remarried because Meher is too stubborn to think otherwise. Abeer will have to force his hand and I won't blame him, Meher will probably hate him or misunderstand his motives but he'll surely win her over. It will be a great way to have the return of their intense love hate story as well as show a redemption track of sorts for Abeer who needs to prove himself as both a husband and father now.