In my opinion I never felt sai ever had a crush on him.
Yes she respected him and trusted him because of her aaba. She never saw him through those lenses.
I mean she was never even interested talking to him,she was always busy fighting with him for her aaba retirement as her prime concern was to get out of there safely to Nagpur.
She was like just any kid ,that talk sweetly and angrily at the same time because she never had any grudges or feelings.