Just the fact that when she walked into his presence the winds were blowing means so much- Ganga is their eternal bond and that can never be shaken! Bani and Jai belong to each other, despite all the heartaches, despite all the pain, no matter what they have gone thorugh they have made Kasamh Se what we have known and loved today!
Ganga is their connection and they are connected at the souls! That is something that is never ever changed. Jai and Bani are both hurt, but behind that hurt and pain is their immense love for one another. No matter how much it is masked, it is there and that is undeniable. They think about each other at every turn in life, despite them living apart from one another.
Jai and Bani have that bond that NOBODY else can share with them, because they are soulmates!