ok now everything is fitting..
Bani has gone to JW to get some money for Ganga...he siad that he will give here the money only if she tells him the reason..Bani again n again says that she cant tell him the reason....finally she is compelled to tell JW about Ganga...JW assumes its Daksh's child...once Ganga is better ..he will push her out of WM...(the promo scene) or maybe the promo scene has been shot only for promotional purpose??