As we all have noticed that no matter how tough Kunal might be, as soon as Siddhi sheds few tears, his heart melts like wax. He can't bear to see tears in Siddhi's eyes. That is really sweet about Kunal and shows how caring he is not only to his family members, but even to Siddhi who he claimed at one point not to like too much. Observing his weakness for Siddhi's tears, I couldn't help myself but to think of below song. Please read it carefully and see how perfectly the song fits into their current situation.
Dekh sakta hoon main kuch bhi hote hue
Nahi main nahi dekh sakta tujhe rote hue
Ek din bigdi kismat savar jaayegi
Yeh khushi humse bach kar kidhar jaayegi
Ghum na kar zindagi yun guzar jaayegi
Raat jaise guzar gayi sote hue
Nahi main nahi dekh sakta tujhe rote hue
Aankh bhar aayi phir kyun kisi baat par
Kar bharosa Siddhi Meri zaat par
Haath rakh de yakeen se mere haath par
Muskura de zara yuhi rote hue
Nahi main nahi dekh sakta tujhe rote hue