They are kissing each other with full passion then Nikita tapped Raj's shoulder because she was having problem in breathing and Raj is just kissing and eating her lips with full passion.
When Nikita tapped on his shoulder multiple times than finally he stopped kissing her and joined his forehead to hers and they both started panting heavily.

Nikita closed her eyes for a second and stood up to leave from there but Raj held her hand and said '' kaha ja rahi ho aab , apne pati ki pyas nai bhujhaogi apne mithe paani se '' .