Yes Yes! Raghav must have called Kalpi on terrace and thought of confessing I love you to her again but this time in filmi style with the message written on the top and all! He must have thought after that Kalpi will also surely confess. He might have want to relive those rainy moments with her again.
Just like in holi where Paakhi keeps searching for Raghav like a makki searching for makkhan (read Raghav), she must have looked for him in the party and allowed herself to the terrace.
But just wondering why Sammy not on guard? Or is it after party surprise for Kalpi and Paakhi must be waiting for an opportunity to jhaadu his house clean. Waise bhi hameshaa she is eager to help him, remember?
Coffe chahiye? Main hoon na banaati hun.
Ab bolegi Raghav ghar ganda ho gaya main saaf kar dun, after all Kamla se kuch toh saaf karna seekha hoga!!!??