From Sam's perspective, here she was seein her guy grooving with his wife after what he told her in the washroom and Radz also tellin her that he doesn't love her. I felt he suddenly had to bring him back to his reality, which is Nandu ke aasuon ka badla.She is still in that denial mode, that it can't be Neil, he is only her best friend. Thatz her problem to sort out.Our Radz knows she is in love. She might also sense that Arjun likes her, but is she sure, nah. She feels it's jus his goodness and maybe sympathy towards her. Only thing she is sure about(she doesn't know Neil is in picture too) is Sam atleast loves Arjun madly. So the kurbaani card will be played.The dance was a thud, hope the confession is justified.