basically from two days before episode
dadi called her with her original name that is nafeeza or something
and in return she called her ammi
so its cleared about that tabeezi is none other than zunaid second wife thats why she was saying about galti
so basically roshni friend hafiza is aman half sister
so in near future hafiza and tabeezi will make permanent entry in zunaid mansion and might be hafiza will clear everything to aman about roshni as she only knows everything