Y is Ishita always in Kapoor House

as far as i no ishita is gonna be palak's (shiv's sis) sis in law.........coz i think she is dat guy's sis who was found wid gauri in a room in kolkotta and gauri did all dis to say palak...........afta dat i hv seen dat guy again but his sis ishita is always in kapoor house............YYYYYYYYYYYYYYYYYYYY...............is she livin wid dem