Though what I did feel was that the way he was lovingly staring at her and smiling, it was like in that moment he completely forgot that she was about to marry his brother, like all he could see or think about was her and loved how he actually complemented her on her beauty; again even here it seemed like he forgot that she was about to become his brother's wife.
My fave part of this scene though was that smile on karthik's face; that's the smile that usually adorns our cuties face. It's been more than two weeks since I saw karthik smile like that or actually show even the slightest bit of joy, but looking at survi dressed as a bride brought back our usual innocent and charming karthik for a few seconds. The way he was looking at her though...it's like he was looking at his own bride, and not his brother's