Meg the final nail will come from the reptile, but I am still not sure if it will be towards JW for leaving her or to Bani.
It will be hard for Bani to leave as she is in charge of WI, so she may not leave. IT just maybe JW who leaves. If JW leaves it will have nothing to do with the reptile, as she has no effect on him. It will be because Bani wants nothing to do with him.
Farah,
The only thing is that if JW leaves and the truth comes out Bani will never form an attachment with Tarun. For the Tarun angle to work out Bani has to believe in JW's guilt for a long time and she will form a friendship/emotional dependence (not love) with Tarun. The only reason I feel that they are not going to carry the ONS truth post leap is that than they really have no reason to have a leap...they can have the misunderstandings go on like they are doing now. SO that gives me faith that things will get cleared pre-leap but one of them will be missing. It makes most sense for Bani to be missing and not know the truth.
meghna