Then he decided to not answer it by the same method and upon pursuing her hesitation and Sir did it for him to say it, 'Jab saamna karne ki himmat na ho toh sote hue sher ko nahin jagate' . What a dialogue.
The simple meaning was in reference to the game two were playing.
I saw it as his way of saying when you are denying your feelings , how do you expect me to accept it and say it. You aren't ready for it which is why you say Sir so why do you expect that I would say I am concerned for you.
I may be overthinking though. But it was beautiful.