Starting from the way he extended his hand to console her (Though he took it back immediately), the way he sat next to her, the way he tried to bring her out of sad mood. Kunal's expression when he overhears siddhi talking to Shilpa...
My favourite one was when siddhi says "The relation which destiny makes can never go wrong and will always be strong enough to withstand all difficult situations", I guess the same kinda dialogue was told by raj to Kunal when he was trying to convince kunal to marry siddhi or during the initial days after marriage...
Above all this time the song "Phir mohabbat" was played when they were together...
The episode was such a treat to watch... in fact just seeing SINAL casual talks itself is worth watching million times...
on the whole it was just fantastic...