Areee ..... woh apni favourite pakhi ki baat kar rahi hai......50+ toh uski 55+ pakhi ke liye hi honge na😉😉samaj laI personally don't think that she is that much old. And by looking in the Ghumland here Virat and Pakhi considered themselves as only 20/21 years old simply behaving as Newlyweds or some kind of Nibba-Nibbi. So by considering Ghum time frame and makers maybe Sai not more than 10/11 years old and will remain in this age only till the last episode. So don't worry they all will remain Nibba-Nibbies in this Ghum universe. Yahan reality mein sab hi cheeze ghum hain.Every crazy and illogical stuff is probably only possible here.