Actress Rani Mukerji touched Karan Johar's feet recently at a press conference for her upcoming film 'Mrs Chatterjee v/s Norway'. Reacting to her gesture, Karan said, "Our relationship is unique. When I was young, she used to be my sister then she became 'bhabhi' (sister-in-law)." Rani responded to Karan by saying, "But won't become your mother any day."