How come Elena is unaware Sona has a daughter ? Okay, she may have broken her relationship with Bose family.. But has she broken her relation with her mother too ? Her mother is Asha's sister right ? She definitely should know Asha is Naani and she may tell to Elena...Now don't tell me Asha ne apni behen ko bhi nahi bataaya she has a grand daughter. đ
Apart from this, family circle is usually so huge, that kahi na kahi se Elena should have easily found out this truth..