"Eight years old Shristi shouted at Mahendra- the driver. After three years, Samrat left for London. Six years after that Shristi took another flight to London."

That makes Shristi 8+3+6=17 years old. But how did Shristi became 18 years old?

" Pratima had always been the moral influence for eighteen years old Shristi who was blossoming into a woman".