I don't think bani will come back....she has left for good and no one will be able to locate her.......why she won't come back becoz she needs to keep thinking that pia and jai betrayed her.....if she comes back now and gets pia and jai married then how do u explain her coming back after the leap and extracting revenge...she wouldn't want to destroy pia and jai whom she got married in the first place........she won't come back....she'll keep thinking about the betrayal even though it will become clear to others that no ons happened....then she comes and takes revenge or gives jai a hard time,till he clears the misunderstanding and woos her back.
i'm pretty sure its pushy at the door with the dna report saying i have come for pia as she's carrying his baby...and when he comes to know that bani has left jai hel'l probably mock at jai and say that justice has been done.
bani should not come back.......I think her reaction was handled exceedingly well by prachi....no hysteria..no melodrama...the creatives should just let her disappear..