He has never gone that far before and has always been respectful of her comfort level because he knew she was immensely physically attracted to him and so was he, to her. So any drastic level of intimacy was not necessary.
The 'Mujhe Koi Fark Nahi Padtha' is going to cost her a lot and I feel so sorry for the girl. I have no idea how she is going to pull this off.
So all bets are off now and he is going to drive her nuts with his unpredictability and intensity